9(9c-1)-12=79c+9

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Solution for 9(9c-1)-12=79c+9 equation:


Simplifying
9(9c + -1) + -12 = 79c + 9

Reorder the terms:
9(-1 + 9c) + -12 = 79c + 9
(-1 * 9 + 9c * 9) + -12 = 79c + 9
(-9 + 81c) + -12 = 79c + 9

Reorder the terms:
-9 + -12 + 81c = 79c + 9

Combine like terms: -9 + -12 = -21
-21 + 81c = 79c + 9

Reorder the terms:
-21 + 81c = 9 + 79c

Solving
-21 + 81c = 9 + 79c

Solving for variable 'c'.

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

Add '-79c' to each side of the equation.
-21 + 81c + -79c = 9 + 79c + -79c

Combine like terms: 81c + -79c = 2c
-21 + 2c = 9 + 79c + -79c

Combine like terms: 79c + -79c = 0
-21 + 2c = 9 + 0
-21 + 2c = 9

Add '21' to each side of the equation.
-21 + 21 + 2c = 9 + 21

Combine like terms: -21 + 21 = 0
0 + 2c = 9 + 21
2c = 9 + 21

Combine like terms: 9 + 21 = 30
2c = 30

Divide each side by '2'.
c = 15

Simplifying
c = 15

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