Answer:
Step-by-step explanation:
We want to know what the value of w is, so we want to get it by itself. So we start by multiplying -7 to both sides of the equation.
-7 W
___ x ___ = -21 x -7
1 -7
By cross cancelling both -7s you get 1w on the left side and 147 on the right
1w = 147
1w is the same as w so your answer is
W = 147
