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.045x+.07(x-500)=511.25
We move all terms to the left:
.045x+.07(x-500)-(511.25)=0
We add all the numbers together, and all the variables
.045x+.07(x-500)-511.25=0
We multiply parentheses
.045x+0.07x-35-511.25=0
We add all the numbers together, and all the variables
0.115x-546.25=0
We move all terms containing x to the left, all other terms to the right
0.115x=546.25
x=546.25/0.115
x=4750
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