Answer:
x = 9
Step-by-step explanation:
Given y varies directly with x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = 9 when x = - 3
9 = - 3k ( divide both sides by - 3 )
- 3 = k
y = - 3x ← equation of variation
When y = - 27 , then
- 27 = - 3x ( divide both sides by - 3 )
9 = x
