42-8x=3(10-4x)

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Solution for 42-8x=3(10-4x) equation: 



42-8x=3(10-4x)

We move all terms to the left:

42-8x-(3(10-4x))=0

We add all the numbers together, and all the variables

-8x-(3(-4x+10))+42=0



We calculate terms in parentheses: -(3(-4x+10)), so:

3(-4x+10)

We multiply parentheses

-12x+30

Back to the equation:

-(-12x+30)



We get rid of parentheses

-8x+12x-30+42=0

We add all the numbers together, and all the variables

4x+12=0

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

4x=-12

x=-12/4

x=-3

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