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3x=5+3.5x
We move all terms to the left:
3x-(5+3.5x)=0
We add all the numbers together, and all the variables
3x-(3.5x+5)=0
We get rid of parentheses
3x-3.5x-5=0
We add all the numbers together, and all the variables
-0.5x-5=0
We move all terms containing x to the left, all other terms to the right
-0.5x=5
x=5/-0.5
x=-10
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