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30=2.5x+3.5
We move all terms to the left:
30-(2.5x+3.5)=0
We get rid of parentheses
-2.5x-3.5+30=0
We add all the numbers together, and all the variables
-2.5x+26.5=0
We move all terms containing x to the left, all other terms to the right
-2.5x=-26.5
x=-26.5/-2.5
x=10+1/1.6666666666667
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