2c-20+2c-37+149+78+70+2c-30=720

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Solution for 2c-20+2c-37+149+78+70+2c-30=720 equation: 


Simplifying
2c + -20 + 2c + -37 + 149 + 78 + 70 + 2c + -30 = 720

Reorder the terms:
-20 + -37 + 149 + 78 + 70 + -30 + 2c + 2c + 2c = 720

Combine like terms: -20 + -37 = -57
-57 + 149 + 78 + 70 + -30 + 2c + 2c + 2c = 720

Combine like terms: -57 + 149 = 92
92 + 78 + 70 + -30 + 2c + 2c + 2c = 720

Combine like terms: 92 + 78 = 170
170 + 70 + -30 + 2c + 2c + 2c = 720

Combine like terms: 170 + 70 = 240
240 + -30 + 2c + 2c + 2c = 720

Combine like terms: 240 + -30 = 210
210 + 2c + 2c + 2c = 720

Combine like terms: 2c + 2c = 4c
210 + 4c + 2c = 720

Combine like terms: 4c + 2c = 6c
210 + 6c = 720

Solving
210 + 6c = 720

Solving for variable 'c'.

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

Add '-210' to each side of the equation.
210 + -210 + 6c = 720 + -210

Combine like terms: 210 + -210 = 0
0 + 6c = 720 + -210
6c = 720 + -210

Combine like terms: 720 + -210 = 510
6c = 510

Divide each side by '6'.
c = 85

Simplifying
c = 85

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