100=7x+3(2x-10)

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Solution for 100=7x+3(2x-10) equation: 



100=7x+3(2x-10)

We move all terms to the left:

100-(7x+3(2x-10))=0



We calculate terms in parentheses: -(7x+3(2x-10)), so:

7x+3(2x-10)

We multiply parentheses

7x+6x-30

We add all the numbers together, and all the variables

13x-30

Back to the equation:

-(13x-30)



We get rid of parentheses

-13x+30+100=0

We add all the numbers together, and all the variables

-13x+130=0

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

-13x=-130

x=-130/-13

x=+10

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