-8r+15r+-5=-12

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Solution for -8r+15r+-5=-12 equation:


Simplifying
-8r + 15r + -5 = -12

Reorder the terms:
-5 + -8r + 15r = -12

Combine like terms: -8r + 15r = 7r
-5 + 7r = -12

Solving
-5 + 7r = -12

Solving for variable 'r'.

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

Add '5' to each side of the equation.
-5 + 5 + 7r = -12 + 5

Combine like terms: -5 + 5 = 0
0 + 7r = -12 + 5
7r = -12 + 5

Combine like terms: -12 + 5 = -7
7r = -7

Divide each side by '7'.
r = -1

Simplifying
r = -1

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