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-0.25=x/2.8-7
We move all terms to the left:
-0.25-(x/2.8-7)=0
We get rid of parentheses
-x/2.8+7-0.25=0
We multiply all the terms by the denominator
-x+7*2.8-(0.25)*2.8=0
We add all the numbers together, and all the variables
-1x+18.9=0
We move all terms containing x to the left, all other terms to the right
-x=-18.9
x=-18.9/-1
x=18+0.9/1
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