Question

Which quantity could go in the blank to make the equation below true r+3r+_=6r

Answer 1

2r

Explanation:

r+3r+_=6r

Let's simplify this first. Subtract (r + 3r), or 4r, from both sides, obtaining

0 + _ = 2r

Then the quantity 2r, when placed in the blank, makes the equation true.

Answer 2

2r

Explanation:

r+3r_=6r

The left side would have to equal 6r

right now it is 4r

by adding 2r it would equal 6r making the equation true.

Hope this helps :)