Question

Please help but right answers

Answer 1

r=-15

Explanation:

51-(-3r+6)=0

3r-6+51=0

3r+45=0

3r=-45

r=-45/3

r=-15

Answer 2

51=-3x+6 -6

45=-3x ÷(-3)

-15=x

Explanation:

prove me wrong