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7.8x-1=0.2x+40.2
We move all terms to the left:
7.8x-1-(0.2x+40.2)=0
We get rid of parentheses
7.8x-0.2x-40.2-1=0
We add all the numbers together, and all the variables
7.6x-41.2=0
We move all terms containing x to the left, all other terms to the right
7.6x=41.2
x=41.2/7.6
x=5+2.6666666666667/6.3333333333333
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