Question

Given that 2 x − 2 y = 23 Find x when y = 9

Answer 1

20.5

Explanation:

2x - 2y = 23

2x - 2(9) = 23

2x - 18 = 23

2x = 23 + 18

2x = 41

x = 20.5

Answer 2

`x=41/2=20.5`

Explanation:

So we have the equation:

`2x-2y=23`

And we want to find x when y is 9.

So, substitute y for 9 and solve for x:

`2x-2(9)=23`

Multiply:

`2x-18=23`

Add 18 to both sides:

`2x=41`

Divide both sides by 2:

`x=41/2=20.5`

So, our answer is 20.5