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4-2.5x=3+7x
We move all terms to the left:
4-2.5x-(3+7x)=0
We add all the numbers together, and all the variables
-2.5x-(7x+3)+4=0
We get rid of parentheses
-2.5x-7x-3+4=0
We add all the numbers together, and all the variables
-9.5x+1=0
We move all terms containing x to the left, all other terms to the right
-9.5x=-1
x=-1/-9.5
x=1/9.5
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