6(2c-4)+21-9c=9

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Solution for 6(2c-4)+21-9c=9 equation:


Simplifying
6(2c + -4) + 21 + -9c = 9

Reorder the terms:
6(-4 + 2c) + 21 + -9c = 9
(-4 * 6 + 2c * 6) + 21 + -9c = 9
(-24 + 12c) + 21 + -9c = 9

Reorder the terms:
-24 + 21 + 12c + -9c = 9

Combine like terms: -24 + 21 = -3
-3 + 12c + -9c = 9

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

Solving
-3 + 3c = 9

Solving for variable 'c'.

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

Add '3' to each side of the equation.
-3 + 3 + 3c = 9 + 3

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

Combine like terms: 9 + 3 = 12
3c = 12

Divide each side by '3'.
c = 4

Simplifying
c = 4

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