Question

Given that 9 x − 4 y = 20 Find y when x = − 2 Give your answer as an improper fraction in its simplest form.

Answer 1

19/-2

Explanation:

the answer is referred in the picture with the working out. hope it was helpful

Answer 2

y =
`-9 (1)/(2)`

Explanation:

9x-4y = 20

Given that x = -2

Putting in the above equation

9(-2) -4y = 20

-18 - 4y = 20

-4y = 20+18

-4y = 38

Dividing both sides by -4

y =
`-(38)/(4)`

y =
`-(19)/(2)`

y =
`-9 (1)/(2)`