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0.7x-3.9=-1.73
We move all terms to the left:
0.7x-3.9-(-1.73)=0
We add all the numbers together, and all the variables
0.7x-2.17=0
We move all terms containing x to the left, all other terms to the right
0.7x=2.17
x=2.17/0.7
x=3+0.07/0.7
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