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5x-30=2.3x+80
We move all terms to the left:
5x-30-(2.3x+80)=0
We get rid of parentheses
5x-2.3x-80-30=0
We add all the numbers together, and all the variables
2.7x-110=0
We move all terms containing x to the left, all other terms to the right
2.7x=110
x=110/2.7
x=40+1/1.35
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