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7x-5x=15.2
We move all terms to the left:
7x-5x-(15.2)=0
We add all the numbers together, and all the variables
2x-15.2=0
We move all terms containing x to the left, all other terms to the right
2x=15.2
x=15.2/2
x=7+1/1.6666666666667
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