20=2(-2c-4)

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Solution for 20=2(-2c-4) equation:


Simplifying
20 = 2(-2c + -4)

Reorder the terms:
20 = 2(-4 + -2c)
20 = (-4 * 2 + -2c * 2)
20 = (-8 + -4c)

Solving
20 = -8 + -4c

Solving for variable 'c'.

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

Add '4c' to each side of the equation.
20 + 4c = -8 + -4c + 4c

Combine like terms: -4c + 4c = 0
20 + 4c = -8 + 0
20 + 4c = -8

Add '-20' to each side of the equation.
20 + -20 + 4c = -8 + -20

Combine like terms: 20 + -20 = 0
0 + 4c = -8 + -20
4c = -8 + -20

Combine like terms: -8 + -20 = -28
4c = -28

Divide each side by '4'.
c = -7

Simplifying
c = -7

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