Question

What value of y makes the equation 4x – 3y = 17 true, when x = 2What value of y makes the equation –2x + y = –8 true when x = 4?

Answer 1

1) y = -3

2) y = 0

Explanation:

1) When x = 2

4x – 3y = 17

4(2) - 3y = 17

8 - 3y = 17

-3y = 17 - 8

-3y = 9

y = -3

2) When x = 4

–2x + y = –8

-2(4) + y = -8

-8 + y = -8

y = -8 + 8

y = 0