I need some help in Algebra 1...so if u think u knoe the answer give it a shot make sure u show ur work&thanx!

Question

1) 4n-2+7n=20 6)3y-2(3y+2)=8
2) 3(r-4)=9 7)3(x+1)=2x+7
3) 6x-4(2x+1)=12 8) 3w-1-4w+4-2w
4) 6(t+7)-20=6t 9) 8x-5=4x+4-2x
5) 4x+3-2x=2x+7 10)15-3y=y+13+y
11) 4a-4=-2a+14

Copy problem wrong here the change one:

1) 4n-2+7n=20 6)3y-2(3y+2)=8
2) 3(r-4)=9 7)3(x+1)=2x+7
3) 6x-4(2x+1)=12 8) 3w-1-4w=4-2w
4) 6(t+7)-20=6t 9) 8x-5=4x+4-2x
5) 4x+3-2x=2x+7 10)15-3y=y+13+y
11) 4a-4=-2a+14

Answer 1

Guessing has nothing to do with it, and only morons would do it that way.

1)
4n-2+7n=20
11n=22
n=2

2) 3(r-4)=9
3r-12=9
3r=21
r=7


3) 6x-4(2x+1)=12
6x-8x-4=12
-2x=16
x=-8

4) 6(t+7)-20=6t
6t+42-20=6t
6t+22= 6t
This equation doesn't make sense as you can't solve for t.

5) 4x+3-2x=2x+7
2x+3= 2x+7
This equation doesn't make sense as you can't solve for x.

6)3y-2(3y+2)=8
3y-6y-4=8
-3y=12
y=-4

7)3(x+1)=2x+7
3x+3=2x+7
x=4

8) 3w-1-4w+4-2w
This isn't an equation.

9) 8x-5=4x+4-2x
8x-5=2x+4
6x=9
x= 9/6

10)15-3y=y+13+y
15-3y=13+2y
2=y



11) 4a-4=-2a+14
6a=18
a=3

Now.....pay attention in class.

Answer 2

1 4n-2+7n=20
11n=22
n=2

2. 3(r-4)=9
r-4=3
r=4+3
r=7

3. 6x-4(2x+1)=12
6x-8x-4=12
-2x=16
x=(-8)

4. 6(t+7)-20=6t
6t+42-20=6t
no solution

5. 4x+3-2x=2x+7
2x+3=2x+7
no solution

6. 3y-2(3y+2)=8
3y-6y-4=8
-3y=12
y=(-4)

7. 3(x+1)=2x+7
3x+3=2x+7
x=4

8. its not an equation

9. 8x-5=4x+4-2x
6x=9
x=3/2

10. 15-3y=y+13+y
15-y=13
y=2

11. 4a-4=(-2a)+14
6a=18
a=3

Answer 3

The object is to get all the letters on one side and all the numbers on the other side of the = side.

4a-4=2a+14 First subtract 2a from both sides of the equation
4a-4-2a=2a+14-2a
2a-4= 14 Now, all the variables are on the left. Next, try to get all the numbers on the right. so, add 4 to both sides.
2a-4+4=14+4
2a=18
a=9


10) 15-3y=y+13+y Get y's on the left, numbers on right
15-3y=2y+13
15-3y-2y=2y+13-2y
15-5y=13
15-5y-15=13-15 Subtract 15 from both sides
-5y= -2 to get y alone, divide both sides by -5
y= -2/-5 which equals 2/5

Answer 4

1. 11n-2=20 11n-2+2=20+2= 11n=22 n=2
2.3r-12=9 3r-12+12=9+12= 3r=21 r=7
3.6x-8x-4=12 -2x-4=12 -2x-4+4=12+4 -2x=16 -2x/2=16/-2
x=-8
4. 6t+42-20=6t 6t+22=6t 6t-6t+22=6t-6=22=0 undefined
5.4x+3-2x=2x+7 2x+3=2x+7 2x-2x+3=2x+7 0x=4 undefined
6.3y-6y-4=8 -3y-4+4=8+4 -3y=12 -3y/-3=12/-3 y=-4
7. 3x+3=2x+7 3x-2x+3=2x-2x+7= x+3=7 x+3-3=7-3 x=4
8.3w-1-4w=-4+2w=-w-1=-4-2w= -w+2w-1=-4-2w+2w=w-1=-4
w-1+1=-4+1= w=-3
9. 8x-5=2x+4= 8x-2x-5=2x-2x+4=6x-5=4 6x-5+5=4+5= 6x=9
6x/6=9/6=x=9/6= x=3/2
10. 15-3y=2y+13= 15-3y+3y=2y+13+3y= 15=5y+13= 15-13=13
11.4a-4=-2a+14=4a+2a-4=-2a+2a+14=6a-4=14=6a-4=14
6a-4+4=14+4= 6a=18 a=3

Answer 5

1) 4n+7n-2=20
11n-2=20
+2 +2
11n=22
divide both sides by 11
n=2
2) foil 3r-12=9
+12 +12
3r=21
r=7
and so on

Answer 6

1)4n-2+7n=20
11n=22
n=2

and 5) is impossible

Its very simple math, are you in 6th grade? But anyways compute all of the letters to one side add/subtract then multiply/divide.

Answer 7

11)4a-4=2a+14
a=9 cuz (4x9)-4=(2x9)+14
36-4=18+_14
which equals 32

u gotta guess and check- ever done that?