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210000=1000x+1200(x+20)
We move all terms to the left:
210000-(1000x+1200(x+20))=0
We calculate terms in parentheses: -(1000x+1200(x+20)), so:We get rid of parentheses
1000x+1200(x+20)
We multiply parentheses
1000x+1200x+24000
We add all the numbers together, and all the variables
2200x+24000
Back to the equation:
-(2200x+24000)
-2200x-24000+210000=0
We add all the numbers together, and all the variables
-2200x+186000=0
We move all terms containing x to the left, all other terms to the right
-2200x=-186000
x=-186000/-2200
x=84+6/11
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