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6.5x+5.5(500-x)=2920
We move all terms to the left:
6.5x+5.5(500-x)-(2920)=0
We add all the numbers together, and all the variables
6.5x+5.5(-1x+500)-2920=0
We multiply parentheses
6.5x-5.5x+2750-2920=0
We add all the numbers together, and all the variables
x-170=0
We move all terms containing x to the left, all other terms to the right
x=170
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