Graph and solve the following equation: 7r-15=r+27

7r-15 = r+27

Move + r to the other side. Sign changes from + r to - r.

7r-r-15 = r-r+27

6r-15 = 27

Move - 15 to the other side. Sign changes from - 15 to + 15

6r-25+15 = 27+15

6r = 42

Divide by 6 for 6r and 42

6r/6 = 42/6

r = 7

Answer : r = 7