-3(c-20)=9(2c-12)

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Solution for -3(c-20)=9(2c-12) equation: 


Simplifying
-3(c + -20) = 9(2c + -12)

Reorder the terms:
-3(-20 + c) = 9(2c + -12)
(-20 * -3 + c * -3) = 9(2c + -12)
(60 + -3c) = 9(2c + -12)

Reorder the terms:
60 + -3c = 9(-12 + 2c)
60 + -3c = (-12 * 9 + 2c * 9)
60 + -3c = (-108 + 18c)

Solving
60 + -3c = -108 + 18c

Solving for variable 'c'.

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

Add '-18c' to each side of the equation.
60 + -3c + -18c = -108 + 18c + -18c

Combine like terms: -3c + -18c = -21c
60 + -21c = -108 + 18c + -18c

Combine like terms: 18c + -18c = 0
60 + -21c = -108 + 0
60 + -21c = -108

Add '-60' to each side of the equation.
60 + -60 + -21c = -108 + -60

Combine like terms: 60 + -60 = 0
0 + -21c = -108 + -60
-21c = -108 + -60

Combine like terms: -108 + -60 = -168
-21c = -168

Divide each side by '-21'.
c = 8

Simplifying
c = 8

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