28=4(x+20)

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Solution for 28=4(x+20) equation: 



28=4(x+20)

We move all terms to the left:

28-(4(x+20))=0



We calculate terms in parentheses: -(4(x+20)), so:

4(x+20)

We multiply parentheses

4x+80

Back to the equation:

-(4x+80)



We get rid of parentheses

-4x-80+28=0

We add all the numbers together, and all the variables

-4x-52=0

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

-4x=52

x=52/-4

x=-13

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