9c-18-15=21

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Solution for 9c-18-15=21 equation:


Simplifying
9c + -18 + -15 = 21

Reorder the terms:
-18 + -15 + 9c = 21

Combine like terms: -18 + -15 = -33
-33 + 9c = 21

Solving
-33 + 9c = 21

Solving for variable 'c'.

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

Add '33' to each side of the equation.
-33 + 33 + 9c = 21 + 33

Combine like terms: -33 + 33 = 0
0 + 9c = 21 + 33
9c = 21 + 33

Combine like terms: 21 + 33 = 54
9c = 54

Divide each side by '9'.
c = 6

Simplifying
c = 6

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