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4c+2(100-c)=268
We move all terms to the left:
4c+2(100-c)-(268)=0
We add all the numbers together, and all the variables
4c+2(-1c+100)-268=0
We multiply parentheses
4c-2c+200-268=0
We add all the numbers together, and all the variables
2c-68=0
We move all terms containing c to the left, all other terms to the right
2c=68
c=68/2
c=34
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