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0.02x+0.12(x+3000)=1340
We move all terms to the left:
0.02x+0.12(x+3000)-(1340)=0
We multiply parentheses
0.02x+0.12x+360-1340=0
We add all the numbers together, and all the variables
0.14x-980=0
We move all terms containing x to the left, all other terms to the right
0.14x=980
x=980/0.14
x=6999+0.14/0.14
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