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12000-x=15500-1.5x
We move all terms to the left:
12000-x-(15500-1.5x)=0
We add all the numbers together, and all the variables
-x-(-1.5x+15500)+12000=0
We add all the numbers together, and all the variables
-1x-(-1.5x+15500)+12000=0
We get rid of parentheses
-1x+1.5x-15500+12000=0
We add all the numbers together, and all the variables
0.5x-3500=0
We move all terms containing x to the left, all other terms to the right
0.5x=3500
x=3500/0.5
x=7000
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