7x=2(x-10)=40

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Solution for 7x=2(x-10)=40 equation: 



7x=2(x-10)=40

We move all terms to the left:

7x-(2(x-10))=0



We calculate terms in parentheses: -(2(x-10)), so:

2(x-10)

We multiply parentheses

2x-20

Back to the equation:

-(2x-20)



We get rid of parentheses

7x-2x+20=0

We add all the numbers together, and all the variables

5x+20=0

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

5x=-20

x=-20/5

x=-4

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