4(-7+3r)=-100

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Solution for 4(-7+3r)=-100 equation: 


Simplifying
4(-7 + 3r) = -100
(-7 * 4 + 3r * 4) = -100
(-28 + 12r) = -100

Solving
-28 + 12r = -100

Solving for variable 'r'.

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

Add '28' to each side of the equation.
-28 + 28 + 12r = -100 + 28

Combine like terms: -28 + 28 = 0
0 + 12r = -100 + 28
12r = -100 + 28

Combine like terms: -100 + 28 = -72
12r = -72

Divide each side by '12'.
r = -6

Simplifying
r = -6

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