10c-20c=90

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Solution for 10c-20c=90 equation: 


Simplifying
10c + -20c = 90

Combine like terms: 10c + -20c = -10c
-10c = 90

Solving
-10c = 90

Solving for variable 'c'.

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

Divide each side by '-10'.
c = -9

Simplifying
c = -9

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