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300=200xx1.5
We move all terms to the left:
300-(200xx1.5)=0
We add all the numbers together, and all the variables
-(+200xx1.5)+300=0
We get rid of parentheses
-200xx1.5+300=0
We move all terms containing x to the left, all other terms to the right
-200xx1.5=-300
x=-300/1
x=-300
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