27=72-r

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Solution for 27=72-r equation:


Simplifying
27 = 72 + -1r

Solving
27 = 72 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
27 + r = 72 + -1r + r

Combine like terms: -1r + r = 0
27 + r = 72 + 0
27 + r = 72

Add '-27' to each side of the equation.
27 + -27 + r = 72 + -27

Combine like terms: 27 + -27 = 0
0 + r = 72 + -27
r = 72 + -27

Combine like terms: 72 + -27 = 45
r = 45

Simplifying
r = 45

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