4(3x+28)=5(x+21)

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Solution for 4(3x+28)=5(x+21) equation: 



4(3x+28)=5(x+21)

We move all terms to the left:

4(3x+28)-(5(x+21))=0

We multiply parentheses

12x-(5(x+21))+112=0



We calculate terms in parentheses: -(5(x+21)), so:

5(x+21)

We multiply parentheses

5x+105

Back to the equation:

-(5x+105)



We get rid of parentheses

12x-5x-105+112=0

We add all the numbers together, and all the variables

7x+7=0

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

7x=-7

x=-7/7

x=-1

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