-3(4c+9)=21

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Solution for -3(4c+9)=21 equation:


Simplifying
-3(4c + 9) = 21

Reorder the terms:
-3(9 + 4c) = 21
(9 * -3 + 4c * -3) = 21
(-27 + -12c) = 21

Solving
-27 + -12c = 21

Solving for variable 'c'.

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

Add '27' to each side of the equation.
-27 + 27 + -12c = 21 + 27

Combine like terms: -27 + 27 = 0
0 + -12c = 21 + 27
-12c = 21 + 27

Combine like terms: 21 + 27 = 48
-12c = 48

Divide each side by '-12'.
c = -4

Simplifying
c = -4

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