Question

1) 2x+8y=20

y=2
2x+8(2)=20

2) x=5
2x+y=10
2(5)+y=10

3) 5x-2y=3
y=2x
5x-2(2x)=3

4) 2y+x=-15
x=3y
2y+(3x)=-15

5) 4x+7y=19
y=x+9
4x+7(x+9)=19

6)y=6x+11
2y-4x+14
2(6x+11)-4x+14

7)2x-8y=6
y=-7-x
2x-8(-7-x)=6

8) x=2y-1
3x-2y=-3
3(2y-1)-2y=-3



what is the process and what x and y equal

Answer 1

-4

Explanation:

Answer 2

If they give you what one variable is, you can plug it into the equation and use algebra to solve it. So:

1)2x=4 -> 4/2 = 2 so x=2

2) y=0

3) x=3

4) 2y + (3*3y) = -15
11y=-15
y = -15/11

5) 4x + 7x + 63 = 19
11x = -44
x = -4