320=280(3-x)

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Solution for 320=280(3-x) equation: 



320=280(3-x)

We move all terms to the left:

320-(280(3-x))=0

We add all the numbers together, and all the variables

-(280(-1x+3))+320=0



We calculate terms in parentheses: -(280(-1x+3)), so:

280(-1x+3)

We multiply parentheses

-280x+840

Back to the equation:

-(-280x+840)



We get rid of parentheses

280x-840+320=0

We add all the numbers together, and all the variables

280x-520=0

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

280x=520

x=520/280

x=1+6/7

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