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7.3+3.5x=12.4+1.5x
We move all terms to the left:
7.3+3.5x-(12.4+1.5x)=0
We add all the numbers together, and all the variables
3.5x-(1.5x+12.4)+7.3=0
We get rid of parentheses
3.5x-1.5x-12.4+7.3=0
We add all the numbers together, and all the variables
2x-5.1=0
We move all terms containing x to the left, all other terms to the right
2x=5.1
x=5.1/2
x=2+1/1.8181818181818
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