4x-40=7(-2x+20)

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Solution for 4x-40=7(-2x+20) equation: 



4x-40=7(-2x+20)

We move all terms to the left:

4x-40-(7(-2x+20))=0



We calculate terms in parentheses: -(7(-2x+20)), so:

7(-2x+20)

We multiply parentheses

-14x+140

Back to the equation:

-(-14x+140)



We get rid of parentheses

4x+14x-140-40=0

We add all the numbers together, and all the variables

18x-180=0

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

18x=180

x=180/18

x=10

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