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13(-8+c)=26
We move all terms to the left:
13(-8+c)-(26)=0
We add all the numbers together, and all the variables
13(c-8)-26=0
We multiply parentheses
13c-104-26=0
We add all the numbers together, and all the variables
13c-130=0
We move all terms containing c to the left, all other terms to the right
13c=130
c=130/13
c=10
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