Answer:
r = - 6
Step-by-step explanation:
Given
6r + 7 = 13 + 7r ( collect terms in r on the left and numbers on the right )
Subtract 7r from both sides
- r + 7 = 13 ( subtract 7 from both sides )
- r = 6 ( multiply both sides by - 1 )
6r+7=13+7r
-6r -6r
------------
7=13+1r
flip the equasin to make it easier
13+1r= 7
-13 -13
---------
1r= -6
