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-0.4(c+3)=4
We move all terms to the left:
-0.4(c+3)-(4)=0
We multiply parentheses
-0.4c-1.2-4=0
We add all the numbers together, and all the variables
-0.4c-5.2=0
We move all terms containing c to the left, all other terms to the right
-0.4c=5.2
c=5.2/-0.4
c=-13
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