9r+15-8r+12=15

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Solution for 9r+15-8r+12=15 equation:


Simplifying
9r + 15 + -8r + 12 = 15

Reorder the terms:
15 + 12 + 9r + -8r = 15

Combine like terms: 15 + 12 = 27
27 + 9r + -8r = 15

Combine like terms: 9r + -8r = 1r
27 + 1r = 15

Solving
27 + 1r = 15

Solving for variable 'r'.

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

Add '-27' to each side of the equation.
27 + -27 + 1r = 15 + -27

Combine like terms: 27 + -27 = 0
0 + 1r = 15 + -27
1r = 15 + -27

Combine like terms: 15 + -27 = -12
1r = -12

Divide each side by '1'.
r = -12

Simplifying
r = -12

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