Question

If -10x – 9y = -7 is a true equation, what would be the value of
-30x – 27y?

Answer 1

-30x-27y = -21

Explanation:

We know that;

-30x-27y = 3(-10x-9y)

Recall, -10x-9y = -7

Thus; -30x-27y = 3(-7) = -21