Math problems.......PEASE HELP?

Question

1.2x + 4y= 16
3x- y =3
x=y=

2. Solve the x
x-2x-3=3

3.

Answer 1

The answer is pay attention in school more and do your own homework. Why aren't your parents helping you?

Answer 2

2x + 4y = 16 (1)

3x - y = 3 (2)

multiply (2) by 4

12x - 4y = 12 (3)

add (1) and (3)

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

14x = 28
x= 28/14 = 2
substitute x = 2 in (2)
3(2) - y = 3
6 - y = 3
- y = 3 - 6
- y = -3
y = 3

therefore x = 2 y = 3

2) x - 2x - 3 = 3
- x -3 = 3
-x = 3+3
- x = 6
x = -6
~~~

Answer 3

For number 1:
isolate the y in the first equation by subtracting the 2x so you get 4y=16-2x....then divide both sides by 4 to isolate the y....y=4-.5x...plug what y equals into the second equation (3x-y=3) so you get 3x-4-.5x=3. Combine the two x's: 2.5x-4=3...add 4 to both sides....2.5x=7...divide by 2.5 to isolate the x....x=2.8....take the x=2.8 and plug it into the first equation of y=4-.5x so you get y=4-.5 (2.8)....y=4-1.4...y= 2.6.

X=2.8
Y=2.6

For number 2:

x-2x-3=3

first combine the x's to get -x-3=3...add 3 to isolate the x....-x=6 divide by -1, x=-6

X=-6

Answer 4

1. x= (16 - 4y)/ 1.2
Replace the x in 3x-y=3

3[(16 -4y)/1.2] - y=3
40 -10y -y=3
-11y= -37
y= 37/11



replace y in x
x=70/33

2. x-2x=3+3
-x=6
x=-6

Answer 5

2x+4y=16
3x-y=3

-y=3-3x
-y/-1=3-3x
y=3x-3
2x +4(3x-3)=16
2x+12x-12=16+12
14x=28
x=2

3(2)-y=3
6-y=3
y=3


x-2x-3=3
-x-3=3
-x=-6
x=6

Answer 6

Eh... neither... yet i assume i'm going to come to a decision on English. I used to love English extra yet intense college made it uninteresting. -_- yet I nonetheless love writing as a interest (and hate math, even however i'm no longer undesirable at it) so i'm going to basically say English.

Answer 7

is it a simultanious equation??

if it it, 1. 2x + 4y
12x - 4y
14x = 12
x=0.86

Answer 8

ok..u got the answer now..who would help u in ur exams ?