Question

HELP PEOPLE I AGAIN FORGOT EVERYTHING

Answer 1

9

Explanation:

Create a proportion

`(x)/(12) = (63)/(84)`

84 divide by what gives you 12? 7

So divide 63 by 7, and you get 9.

This doesn't work with all of these problems so you can always cross multiply then divide.

12(63) = 756

84(x) = 84x

84x = 756

84x/84 = 756/84

x = 9