Solution
Step 1
Expand the brackets
8(9r-1) - 9(-8r + 2)
72r - 8 +72r -18
Step 2
Bring like terms together
72r + 72r -8 -18
Step 3
Sum and get the expression in its simplest for after factorization
144r -26
After factorization we will have in its simplest form the following answer
2 (72r -13)