r-42=77

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Solution for r-42=77 equation: 


Simplifying
r + -42 = 77

Reorder the terms:
-42 + r = 77

Solving
-42 + r = 77

Solving for variable 'r'.

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

Add '42' to each side of the equation.
-42 + 42 + r = 77 + 42

Combine like terms: -42 + 42 = 0
0 + r = 77 + 42
r = 77 + 42

Combine like terms: 77 + 42 = 119
r = 119

Simplifying
r = 119

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