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7.8x+1.3=1.8x+3.7
We move all terms to the left:
7.8x+1.3-(1.8x+3.7)=0
We get rid of parentheses
7.8x-1.8x-3.7+1.3=0
We add all the numbers together, and all the variables
6x-2.4=0
We move all terms containing x to the left, all other terms to the right
6x=2.4
x=2.4/6
x=1/2.5
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