42=2(9-2x)

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Solution for 42=2(9-2x) equation: 



42=2(9-2x)

We move all terms to the left:

42-(2(9-2x))=0

We add all the numbers together, and all the variables

-(2(-2x+9))+42=0



We calculate terms in parentheses: -(2(-2x+9)), so:

2(-2x+9)

We multiply parentheses

-4x+18

Back to the equation:

-(-4x+18)



We get rid of parentheses

4x-18+42=0

We add all the numbers together, and all the variables

4x+24=0

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

4x=-24

x=-24/4

x=-6

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