-84=3(4r-4)

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Solution for -84=3(4r-4) equation:


Simplifying
-84 = 3(4r + -4)

Reorder the terms:
-84 = 3(-4 + 4r)
-84 = (-4 * 3 + 4r * 3)
-84 = (-12 + 12r)

Solving
-84 = -12 + 12r

Solving for variable 'r'.

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

Add '-12r' to each side of the equation.
-84 + -12r = -12 + 12r + -12r

Combine like terms: 12r + -12r = 0
-84 + -12r = -12 + 0
-84 + -12r = -12

Add '84' to each side of the equation.
-84 + 84 + -12r = -12 + 84

Combine like terms: -84 + 84 = 0
0 + -12r = -12 + 84
-12r = -12 + 84

Combine like terms: -12 + 84 = 72
-12r = 72

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

Simplifying
r = -6

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