C-2(c-20)=9c

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


Simplifying
C + -2(c + -20) = 9c

Reorder the terms:
C + -2(-20 + c) = 9c
C + (-20 * -2 + c * -2) = 9c
C + (40 + -2c) = 9c

Reorder the terms:
40 + C + -2c = 9c

Solving
40 + C + -2c = 9c

Solving for variable 'C'.

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

Add '-40' to each side of the equation.
40 + C + -40 + -2c = -40 + 9c

Reorder the terms:
40 + -40 + C + -2c = -40 + 9c

Combine like terms: 40 + -40 = 0
0 + C + -2c = -40 + 9c
C + -2c = -40 + 9c

Add '2c' to each side of the equation.
C + -2c + 2c = -40 + 9c + 2c

Combine like terms: -2c + 2c = 0
C + 0 = -40 + 9c + 2c
C = -40 + 9c + 2c

Combine like terms: 9c + 2c = 11c
C = -40 + 11c

Simplifying
C = -40 + 11c

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