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3000+125x=2500+150x
We move all terms to the left:
3000+125x-(2500+150x)=0
We add all the numbers together, and all the variables
125x-(150x+2500)+3000=0
We get rid of parentheses
125x-150x-2500+3000=0
We add all the numbers together, and all the variables
-25x+500=0
We move all terms containing x to the left, all other terms to the right
-25x=-500
x=-500/-25
x=+20
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