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0.09(x+2000)=3870
We move all terms to the left:
0.09(x+2000)-(3870)=0
We multiply parentheses
0.09x+180-3870=0
We add all the numbers together, and all the variables
0.09x-3690=0
We move all terms containing x to the left, all other terms to the right
0.09x=3690
x=3690/0.09
x=41000
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