-9r+42+7r=-30

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Solution for -9r+42+7r=-30 equation:


Simplifying
-9r + 42 + 7r = -30

Reorder the terms:
42 + -9r + 7r = -30

Combine like terms: -9r + 7r = -2r
42 + -2r = -30

Solving
42 + -2r = -30

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 + -2r = -30 + -42

Combine like terms: 42 + -42 = 0
0 + -2r = -30 + -42
-2r = -30 + -42

Combine like terms: -30 + -42 = -72
-2r = -72

Divide each side by '-2'.
r = 36

Simplifying
r = 36

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