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2900=250+132.5x
We move all terms to the left:
2900-(250+132.5x)=0
We add all the numbers together, and all the variables
-(132.5x+250)+2900=0
We get rid of parentheses
-132.5x-250+2900=0
We add all the numbers together, and all the variables
-132.5x+2650=0
We move all terms containing x to the left, all other terms to the right
-132.5x=-2650
x=-2650/-132.5
x=+20
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