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 = 35
r = 35

Simplifying
r = 35

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