MATH ... plz help me with this math?

Question

7x-3=10x

p-9=4p

2.3n-8=1.2n+3

3/8y-5=5/8y-3

6+2(x-4)=2(x-1)

2(6-5d)=8

16x-72=20+20x

Answer 1

1) 7x-3=10x ...x= -1

you minus the 7x from both sides and then divide by 3

2) p-9=4p...p= -1

subtract p then divide by -3

3) 2.3n-8=1.2n+3.........n=10

subtract 1.2n from both sides then add 8 to both sides and then divide by 1.1

Answer 2

7x-3=10
First you add 3 to both sides to isolate the variable
7x=13
Then divide both sides by 7
x=1.857


p-9=4p
First you subtract p from both sides
-9=3p
and then divide both sides by -9
-0.333=p or p=(-0.333)


2.3n-8=1.2n+3
First add 8 to both sides
2.3n=1.2n+11
then subtract 1.2n from both sides
1.1n=11
Lastly divide both sides by 1.1 to isolate the variable
n=10


3/8y-5=5/8y-3
First add 3 to both sides
3/8y-2=5/8y
now subtract 3/8y from both sides
-2=2/8y
then multiply both sides by 8/1 so you can cross cancel with the 8 in 2/8y
-16=2y
then divide both sides by 2
-8=y
(that one should be right, but cross check with someone or check with a teacher. I'm not totally unconfident in my math skills, its just i don't want u to totally rely on me if i am wrong)


6+2(x-4)=2(x-1)
first distribute the twos
6+2x-8=2x-2
then combine like terms
2x-2=2x-2
as you can see from here there's no more you can work out because all it will do is equal zero so the answer is...
No Solution

2(6-5d)=8
First you distribute the 2
12-10d=8
then subtract 12 from both sides
-10d=-4
then divide both sides by -10
d=0.4

16x-72=20+20x
First subtract 20 from both sides
16x-92=20x
then subtract 16x from both sides
-92=4x
Lastly divide both sides by 4
-23=x or x=(-23)


BTW, You may want to get a tutor instead of going on Yahoo! Answers for help. Hey, I'm sure you can go to your Algebra teacher or whatever and get some help before or after school. It doesn't mean you're stupid, it just means you need a little help.

Answer 3

1. 7x-3=10x 7x-3=10x-7x= -3=3x= -1=x
2. p-9=4p p-p-9=4p-p=-9=3p= -3=p
3. 2.3n-8=1.2n+3 2.3n-1.2n-8=1.2n-1.2n+3 =1.1n-8=3=
1.1n-8+8=3+8= 1.1n=11= n=10
4.3/8y-5=5/8y-3=3/8y-3/8y-5=5/8y-3/8y-3=-5=2/8y-3=
-5+3=2/8y-3+3= 2=2/8y=2=1/4y=2(4)=1/4(4)y= 8=y
5. 6+2(x-4)=2(x-1)=6+2x-8=2x-2=2x-2=2x-2=0x=0 0=0
6. 2(6-5d)=8 12-10d=8 12-12-10d=8=-10d=-4=
-10d/-10=-4/-10= d=4/10=2/5
7. 16x-72=20+20x= 16x-72-16x=20+20x-16x=-72=20+4x
-72-20=20-20+4x=-92=4x= -23=x

Answer 4

Woah. Well since it looks like you just posted your entire homework assignment, let's do a quick review.

Remember, to "solve" for a variable, you want to get the variable to one side of the equation. for example, if your variable is x, then you want it to look like x = "something"

Also remember that anything you do to one side of the equation you have to do to the other side to keep it equal.

Lets look at the first problem:

7x - 3 = 10x [we eventually want x = "something" ]

= -3 = 10x - 7x [ Lets subtract 7x from both sides ]

= -3 = 3x [ because 10x-7x is equal to 3x ]

= -3/3 = 3x/3 [ divide by 3 because 3x/3 is equal to x ]

= -1 = x [ -3/3 is equal to 1 ]

So, x = -1

The other problems are similar, just look to see what you can add, subtract, multiply, divide, or distribute to get the equation into a simple form. Play around with them. Sometimes there is more than one way to do the problem.

Answer 5

You just have to get the variables on one side of the equation. For the first one:

7x-3=10x

Subtract 7x from both sides. Now it will be:

-3=3x

Then divide both side by 3.
x=-1

See how it works?

Answer 6

7x-3=10x
x=1
p-9=4p
p=-3

Answer 7

The formula to discover the area of a triangle is: section = a million/2 the bottom circumstances the proper or A = a million/2BH. in case you comprehend the area of a triangle = 60 squaretoes and the bottom = 6 feet, what's the proper? 5 feet 10 feet seventy 2 feet 20 feet A=a million/2BH or 60=a million/2 ( 6 x 20) The formula to discover the area of a triangle is: section = a million/2 the bottom circumstances the proper or A = a million/2BH. in case you comprehend the area of a triangle = 60 squaretoes and the bottom = 12 feet, what's the proper? A.) 5 feet. B.) 10 feet. C.) seventy 2 feet D.) 36 feet A=a million/2BH 60=a million/2 (12H) H = 10 Take the equation and administration the quantity to make the equation ordinary to remedy. were given it ? allow me comprehend no matter if it really is starting up to make extra experience to you solid success !!

Answer 8

solve for X
so isolate the variable (move all the numbers on one side and the x's on the other)
I cant do the math for you... thats cheating :)
so to get lets say 7x separated....
divide it by 7
[ 7x / 7 cancells it out...]
but remeber to do it on both sides of the = sign!
lol this is porbly confuzing so...

heres a good website...
[dont be offended by the name though lol]
http://library.thinkquest.org/20991/alg/eq.html

Answer 9

wow i am learing this right now in school and i am rele good at it i actually had to teach kids that were smarter than me how to do it but that would cheating sry if you cant figure this out maybe you should ask ur teacher for help. I DO!!

Answer 10

1. x= -1
2. p= -3
3. n= 10
4. y= -8
5. x= 1
6. d= -0.4
7. x= -23