142=10x+8(x+20)

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Solution for 142=10x+8(x+20) equation: 



142=10x+8(x+20)

We move all terms to the left:

142-(10x+8(x+20))=0



We calculate terms in parentheses: -(10x+8(x+20)), so:

10x+8(x+20)

We multiply parentheses

10x+8x+160

We add all the numbers together, and all the variables

18x+160

Back to the equation:

-(18x+160)



We get rid of parentheses

-18x-160+142=0

We add all the numbers together, and all the variables

-18x-18=0

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

-18x=18

x=18/-18

x=-1

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