-3r=42-15

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Solution for -3r=42-15 equation: 


Simplifying
-3r = 42 + -15

Combine like terms: 42 + -15 = 27
-3r = 27

Solving
-3r = 27

Solving for variable 'r'.

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

Divide each side by '-3'.
r = -9

Simplifying
r = -9

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