r+4=15

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Solution for r+4=15 equation: 


Simplifying
r + 4 = 15

Reorder the terms:
4 + r = 15

Solving
4 + r = 15

Solving for variable 'r'.

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

Add '-4' to each side of the equation.
4 + -4 + r = 15 + -4

Combine like terms: 4 + -4 = 0
0 + r = 15 + -4
r = 15 + -4

Combine like terms: 15 + -4 = 11
r = 11

Simplifying
r = 11

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