15+r-22=9

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Solution for 15+r-22=9 equation: 


Simplifying
15 + r + -22 = 9

Reorder the terms:
15 + -22 + r = 9

Combine like terms: 15 + -22 = -7
-7 + r = 9

Solving
-7 + r = 9

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 = 9 + 7

Combine like terms: -7 + 7 = 0
0 + r = 9 + 7
r = 9 + 7

Combine like terms: 9 + 7 = 16
r = 16

Simplifying
r = 16

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