Question

If y varies directly with x and y = -7 when x = -1, find x when y = -84.

Answer 1

y=kx

-7=k *-1 solve for k

-84= k*x solve for x. Remember k should be a number cuzz you olved for it :D

Answer 2

-7=k*-1
-7/-1=k k=7

so
-84=7*x
-84/7=x x=-12