-4(3+7r)=-124

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Solution for -4(3+7r)=-124 equation: 


Simplifying
-4(3 + 7r) = -124
(3 * -4 + 7r * -4) = -124
(-12 + -28r) = -124

Solving
-12 + -28r = -124

Solving for variable 'r'.

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

Add '12' to each side of the equation.
-12 + 12 + -28r = -124 + 12

Combine like terms: -12 + 12 = 0
0 + -28r = -124 + 12
-28r = -124 + 12

Combine like terms: -124 + 12 = -112
-28r = -112

Divide each side by '-28'.
r = 4

Simplifying
r = 4

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