840=12(x+50)

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Solution for 840=12(x+50) equation: 



840=12(x+50)

We move all terms to the left:

840-(12(x+50))=0



We calculate terms in parentheses: -(12(x+50)), so:

12(x+50)

We multiply parentheses

12x+600

Back to the equation:

-(12x+600)



We get rid of parentheses

-12x-600+840=0

We add all the numbers together, and all the variables

-12x+240=0

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

-12x=-240

x=-240/-12

x=+20

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