12-4c-3c=40

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Solution for 12-4c-3c=40 equation: 


Simplifying
12 + -4c + -3c = 40

Combine like terms: -4c + -3c = -7c
12 + -7c = 40

Solving
12 + -7c = 40

Solving for variable 'c'.

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

Add '-12' to each side of the equation.
12 + -12 + -7c = 40 + -12

Combine like terms: 12 + -12 = 0
0 + -7c = 40 + -12
-7c = 40 + -12

Combine like terms: 40 + -12 = 28
-7c = 28

Divide each side by '-7'.
c = -4

Simplifying
c = -4

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