6(4r+12)=-2(2r+20)

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Solution for 6(4r+12)=-2(2r+20) equation:


Simplifying
6(4r + 12) = -2(2r + 20)

Reorder the terms:
6(12 + 4r) = -2(2r + 20)
(12 * 6 + 4r * 6) = -2(2r + 20)
(72 + 24r) = -2(2r + 20)

Reorder the terms:
72 + 24r = -2(20 + 2r)
72 + 24r = (20 * -2 + 2r * -2)
72 + 24r = (-40 + -4r)

Solving
72 + 24r = -40 + -4r

Solving for variable 'r'.

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

Add '4r' to each side of the equation.
72 + 24r + 4r = -40 + -4r + 4r

Combine like terms: 24r + 4r = 28r
72 + 28r = -40 + -4r + 4r

Combine like terms: -4r + 4r = 0
72 + 28r = -40 + 0
72 + 28r = -40

Add '-72' to each side of the equation.
72 + -72 + 28r = -40 + -72

Combine like terms: 72 + -72 = 0
0 + 28r = -40 + -72
28r = -40 + -72

Combine like terms: -40 + -72 = -112
28r = -112

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

Simplifying
r = -4

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