20=-10(9c-2)+90c

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Solution for 20=-10(9c-2)+90c equation: 


Simplifying
20 = -10(9c + -2) + 90c

Reorder the terms:
20 = -10(-2 + 9c) + 90c
20 = (-2 * -10 + 9c * -10) + 90c
20 = (20 + -90c) + 90c

Combine like terms: -90c + 90c = 0
20 = 20 + 0
20 = 20

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

Combine like terms: 20 + -20 = 0
0 = 20 + -20

Combine like terms: 20 + -20 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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