-3r+7-7=13-7

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Solution for -3r+7-7=13-7 equation: 


Simplifying
-3r + 7 + -7 = 13 + -7

Reorder the terms:
7 + -7 + -3r = 13 + -7

Combine like terms: 7 + -7 = 0
0 + -3r = 13 + -7
-3r = 13 + -7

Combine like terms: 13 + -7 = 6
-3r = 6

Solving
-3r = 6

Solving for variable 'r'.

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

Divide each side by '-3'.
r = -2

Simplifying
r = -2

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