r-(-9)=54

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Solution for r-(-9)=54 equation: 


Simplifying
r + -1(-9) = 54

Multiply -1 * -9
r + 9 = 54

Reorder the terms:
9 + r = 54

Solving
9 + r = 54

Solving for variable 'r'.

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

Add '-9' to each side of the equation.
9 + -9 + r = 54 + -9

Combine like terms: 9 + -9 = 0
0 + r = 54 + -9
r = 54 + -9

Combine like terms: 54 + -9 = 45
r = 45

Simplifying
r = 45

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