Question

Given that 3x - 8y = 28

Find y when x = 9
Give your answer as a fraction in its simplest form

Answer 1

y = -1/8

Explanation:

substitute 9 in for x in the equation

3(9) - 8y = 28

27 - 8y = 28

-27 from both sides to get

-8y = 1

divide both sides by -8

y = -1/8