Question

Find the sum.
5x 4
____ + ____
7x - y y - 7x

Answer 1

B. 5x+4

Explanation:

Solving this is quite easy.

1. Add 5x and 4 getting 5x+4
2. Look at your bottom variables..since 7x and -7x are opposites they will cancel out! And same thing goes for y and -y.