5(-10C+15)+20C=-15-3C-18

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Solution for 5(-10C+15)+20C=-15-3C-18 equation: 


Simplifying
5(-10C + 15) + 20C = -15 + -3C + -18

Reorder the terms:
5(15 + -10C) + 20C = -15 + -3C + -18
(15 * 5 + -10C * 5) + 20C = -15 + -3C + -18
(75 + -50C) + 20C = -15 + -3C + -18

Combine like terms: -50C + 20C = -30C
75 + -30C = -15 + -3C + -18

Reorder the terms:
75 + -30C = -15 + -18 + -3C

Combine like terms: -15 + -18 = -33
75 + -30C = -33 + -3C

Solving
75 + -30C = -33 + -3C

Solving for variable 'C'.

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

Add '3C' to each side of the equation.
75 + -30C + 3C = -33 + -3C + 3C

Combine like terms: -30C + 3C = -27C
75 + -27C = -33 + -3C + 3C

Combine like terms: -3C + 3C = 0
75 + -27C = -33 + 0
75 + -27C = -33

Add '-75' to each side of the equation.
75 + -75 + -27C = -33 + -75

Combine like terms: 75 + -75 = 0
0 + -27C = -33 + -75
-27C = -33 + -75

Combine like terms: -33 + -75 = -108
-27C = -108

Divide each side by '-27'.
C = 4

Simplifying
C = 4

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