-6r+4r=-30

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Solution for -6r+4r=-30 equation: 


Simplifying
-6r + 4r = -30

Combine like terms: -6r + 4r = -2r
-2r = -30

Solving
-2r = -30

Solving for variable 'r'.

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

Divide each side by '-2'.
r = 15

Simplifying
r = 15

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