420=-7(5x-20)

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Solution for 420=-7(5x-20) equation: 



420=-7(5x-20)

We move all terms to the left:

420-(-7(5x-20))=0



We calculate terms in parentheses: -(-7(5x-20)), so:

-7(5x-20)

We multiply parentheses

-35x+140

Back to the equation:

-(-35x+140)



We get rid of parentheses

35x-140+420=0

We add all the numbers together, and all the variables

35x+280=0

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

35x=-280

x=-280/35

x=-8

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