20-3c=-20-7c

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Solution for 20-3c=-20-7c equation: 



20-3c=-20-7c

We move all terms to the left:

20-3c-(-20-7c)=0

We add all the numbers together, and all the variables

-3c-(-7c-20)+20=0

We get rid of parentheses

-3c+7c+20+20=0

We add all the numbers together, and all the variables

4c+40=0

We move all terms containing c to the left, all other terms to the right

4c=-40

c=-40/4

c=-10

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