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100x+2=40x+4
We move all terms to the left:
100x+2-(40x+4)=0
We get rid of parentheses
100x-40x-4+2=0
We add all the numbers together, and all the variables
60x-2=0
We move all terms containing x to the left, all other terms to the right
60x=2
x=2/60
x=1/30
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