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2.5=-3+7x^-1+2x
We move all terms to the left:
2.5-(-3+7x^-1+2x)=0
We get rid of parentheses
-7x^-2x+3+1+2.5=0
We add all the numbers together, and all the variables
-9x+6.5=0
We move all terms containing x to the left, all other terms to the right
-9x=-6.5
x=-6.5/-9
x=1.8571428571429/2.5714285714286
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