12c+9(7-c)=

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Solution for 12c+9(7-c)= equation:


Simplifying
12c + 9(7 + -1c) = 0
12c + (7 * 9 + -1c * 9) = 0
12c + (63 + -9c) = 0

Reorder the terms:
63 + 12c + -9c = 0

Combine like terms: 12c + -9c = 3c
63 + 3c = 0

Solving
63 + 3c = 0

Solving for variable 'c'.

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

Add '-63' to each side of the equation.
63 + -63 + 3c = 0 + -63

Combine like terms: 63 + -63 = 0
0 + 3c = 0 + -63
3c = 0 + -63

Combine like terms: 0 + -63 = -63
3c = -63

Divide each side by '3'.
c = -21

Simplifying
c = -21

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