-7r+8=-13

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Solution for -7r+8=-13 equation: 


Simplifying
-7r + 8 = -13

Reorder the terms:
8 + -7r = -13

Solving
8 + -7r = -13

Solving for variable 'r'.

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

Add '-8' to each side of the equation.
8 + -8 + -7r = -13 + -8

Combine like terms: 8 + -8 = 0
0 + -7r = -13 + -8
-7r = -13 + -8

Combine like terms: -13 + -8 = -21
-7r = -21

Divide each side by '-7'.
r = 3

Simplifying
r = 3

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