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12.5x+4=7x+3712.5x+4=7x+37
We move all terms to the left:
12.5x+4-(7x+3712.5x+4)=0
We add all the numbers together, and all the variables
12.5x-(3719.5x+4)+4=0
We get rid of parentheses
12.5x-3719.5x-4+4=0
We add all the numbers together, and all the variables
-3707x=0
x=0/-3707
x=0
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