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80+50x(0.25=45)
We move all terms to the left:
80+50x(0.25-(45))=0
We add all the numbers together, and all the variables
50x(-44.75)+80=0
We multiply parentheses
-2237.5x+80=0
We move all terms containing x to the left, all other terms to the right
-2237.5x=-80
x=-80/-2237.5
x=80/2237.5
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