Question

−6k + 7k

12r − 8 − 12

n − 10 + 9n − 3

−4x − 10x

−r − 10r

There all diffrent equations

Answer 1

1 is k

2 is 12r minus 20

3 10n - 13

4 -14x

5 -11r

Explanation:

think you have to simplify