0(1+9r)-7(2r+2)=-72

Solution for 0(1+9r)-7(2r+2)=-72 equation:

Simplifying
0(1 + 9r) + -7(2r + 2) = -72

Anything times zero is zero.
0(1 + 9r) + -7(2r + 2) = -72

Reorder the terms:
0 + -7(2 + 2r) = -72
0 + (2 * -7 + 2r * -7) = -72
0 + (-14 + -14r) = -72

Combine like terms: 0 + -14 = -14
-14 + -14r = -72

Solving
-14 + -14r = -72

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '14' to each side of the equation.
-14 + 14 + -14r = -72 + 14

Combine like terms: -14 + 14 = 0
0 + -14r = -72 + 14
-14r = -72 + 14

Combine like terms: -72 + 14 = -58
-14r = -58

Divide each side by '-14'.
r = 4.142857143

Simplifying
r = 4.142857143