Question

Solve for x when y = 4
2x + 2y = 20

Answer 1

`x=6\\`

Explanation:

`2x+2(4)=20`

`2x+8=20`

Subtract both sides by 8

`2x=12`

Divide both sides by 2 to get x alone

`x=6`

Hope this is helpful

Answer 2

x=6

Explanation:

2x + 2y = 20

Let y=4

2x +2(4) = 20

Multiply

2x+8 = 20

Subtract 8 from each side

2x+8-8= 20-8

2x = 12

Divide by 2

2x/2 = 12/2

x = 6