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45+12.50x=75+7.50x
We move all terms to the left:
45+12.50x-(75+7.50x)=0
We add all the numbers together, and all the variables
12.50x-(7.50x+75)+45=0
We get rid of parentheses
12.50x-7.50x-75+45=0
We add all the numbers together, and all the variables
5x-30=0
We move all terms containing x to the left, all other terms to the right
5x=30
x=30/5
x=6
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