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-4.5(5+7.5c)=-20.5
We move all terms to the left:
-4.5(5+7.5c)-(-20.5)=0
We add all the numbers together, and all the variables
-4.5(7.5c+5)-(-20.5)=0
We add all the numbers together, and all the variables
-4.5(7.5c+5)+20.5=0
We multiply parentheses
-31.5c-22.5+20.5=0
We add all the numbers together, and all the variables
-31.5c-2=0
We move all terms containing c to the left, all other terms to the right
-31.5c=2
c=2/-31.5
c=-2/31.5
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