r+5+7r=13

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Solution for r+5+7r=13 equation: 


Simplifying
r + 5 + 7r = 13

Reorder the terms:
5 + r + 7r = 13

Combine like terms: r + 7r = 8r
5 + 8r = 13

Solving
5 + 8r = 13

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 + 8r = 13 + -5

Combine like terms: 5 + -5 = 0
0 + 8r = 13 + -5
8r = 13 + -5

Combine like terms: 13 + -5 = 8
8r = 8

Divide each side by '8'.
r = 1

Simplifying
r = 1

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