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4.7+2.5x=7.7
We move all terms to the left:
4.7+2.5x-(7.7)=0
We add all the numbers together, and all the variables
2.5x-3=0
We move all terms containing x to the left, all other terms to the right
2.5x=3
x=3/2.5
x=1+0.5/2.5
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