r+7=15

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Solution for r+7=15 equation: 


Simplifying
r + 7 = 15

Reorder the terms:
7 + r = 15

Solving
7 + r = 15

Solving for variable 'r'.

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

Add '-7' to each side of the equation.
7 + -7 + r = 15 + -7

Combine like terms: 7 + -7 = 0
0 + r = 15 + -7
r = 15 + -7

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

Simplifying
r = 8

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