0.12x+0.03(x+9000)=420

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Solution for 0.12x+0.03(x+9000)=420 equation: 



0.12x+0.03(x+9000)=420

We move all terms to the left:

0.12x+0.03(x+9000)-(420)=0

We multiply parentheses

0.12x+0.03x+270-420=0

We add all the numbers together, and all the variables

0.15x-150=0

We move all terms containing x to the left, all other terms to the right

0.15x=150

x=150/0.15

x=1000

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