75=7c-9

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Solution for 75=7c-9 equation:


Simplifying
75 = 7c + -9

Reorder the terms:
75 = -9 + 7c

Solving
75 = -9 + 7c

Solving for variable 'c'.

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

Add '-7c' to each side of the equation.
75 + -7c = -9 + 7c + -7c

Combine like terms: 7c + -7c = 0
75 + -7c = -9 + 0
75 + -7c = -9

Add '-75' to each side of the equation.
75 + -75 + -7c = -9 + -75

Combine like terms: 75 + -75 = 0
0 + -7c = -9 + -75
-7c = -9 + -75

Combine like terms: -9 + -75 = -84
-7c = -84

Divide each side by '-7'.
c = 12

Simplifying
c = 12

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