2(x+21)=5x-3(4-x)

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Solution for 2(x+21)=5x-3(4-x) equation: 



2(x+21)=5x-3(4-x)

We move all terms to the left:

2(x+21)-(5x-3(4-x))=0

We add all the numbers together, and all the variables

2(x+21)-(5x-3(-1x+4))=0

We multiply parentheses

2x-(5x-3(-1x+4))+42=0



We calculate terms in parentheses: -(5x-3(-1x+4)), so:

5x-3(-1x+4)

We multiply parentheses

5x+3x-12

We add all the numbers together, and all the variables

8x-12

Back to the equation:

-(8x-12)



We get rid of parentheses

2x-8x+12+42=0

We add all the numbers together, and all the variables

-6x+54=0

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

-6x=-54

x=-54/-6

x=+9

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