-5(7-c)+9(7-c)=-20

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Solution for -5(7-c)+9(7-c)=-20 equation: 



-5(7-c)+9(7-c)=-20

We move all terms to the left:

-5(7-c)+9(7-c)-(-20)=0

We add all the numbers together, and all the variables

-5(-1c+7)+9(-1c+7)-(-20)=0

We add all the numbers together, and all the variables

-5(-1c+7)+9(-1c+7)+20=0

We multiply parentheses

5c-9c-35+63+20=0

We add all the numbers together, and all the variables

-4c+48=0

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

-4c=-48

c=-48/-4

c=+12

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