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3c+4(c-15)+2c=7.50
We move all terms to the left:
3c+4(c-15)+2c-(7.50)=0
We add all the numbers together, and all the variables
3c+4(c-15)+2c-(7.5)=0
We add all the numbers together, and all the variables
5c+4(c-15)-7.5=0
We multiply parentheses
5c+4c-60-7.5=0
We add all the numbers together, and all the variables
9c-67.5=0
We move all terms containing c to the left, all other terms to the right
9c=67.5
c=67.5/9
c=7+3/6
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