7c-78=5c-40

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Solution for 7c-78=5c-40 equation:


Simplifying
7c + -78 = 5c + -40

Reorder the terms:
-78 + 7c = 5c + -40

Reorder the terms:
-78 + 7c = -40 + 5c

Solving
-78 + 7c = -40 + 5c

Solving for variable 'c'.

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

Add '-5c' to each side of the equation.
-78 + 7c + -5c = -40 + 5c + -5c

Combine like terms: 7c + -5c = 2c
-78 + 2c = -40 + 5c + -5c

Combine like terms: 5c + -5c = 0
-78 + 2c = -40 + 0
-78 + 2c = -40

Add '78' to each side of the equation.
-78 + 78 + 2c = -40 + 78

Combine like terms: -78 + 78 = 0
0 + 2c = -40 + 78
2c = -40 + 78

Combine like terms: -40 + 78 = 38
2c = 38

Divide each side by '2'.
c = 19

Simplifying
c = 19

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