28-13=3(x-7)

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Solution for 28-13=3(x-7) equation: 



28-13=3(x-7)

We move all terms to the left:

28-13-(3(x-7))=0

We add all the numbers together, and all the variables

-(3(x-7))+15=0



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

3(x-7)

We multiply parentheses

3x-21

Back to the equation:

-(3x-21)



We get rid of parentheses

-3x+21+15=0

We add all the numbers together, and all the variables

-3x+36=0

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

-3x=-36

x=-36/-3

x=+12

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