-7r plus 6 equals 9-6r plus 1?

Answer 1

You are searching for the value of r.
-7r + 6 = 9 - 6r + 1
Notice the 9 and the 1 on the right side. Since they are common factors (terms not attached to x), they can be added.
-7r + 6 = -6r + 10
Subtract 6 from both sides to eliminate the 6 on the left.
-7r = -6r + 4
Add 7r to both sides, leaving r-terms on only one side.
0 = r + 4
Subtract 4 from both sides, so one side is constant and the other is the variable.
-4 = r
The answer is -4 is equal to r.