28+17x=12+21x

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Solution for 28+17x=12+21x equation: 



28+17x=12+21x

We move all terms to the left:

28+17x-(12+21x)=0

We add all the numbers together, and all the variables

17x-(21x+12)+28=0

We get rid of parentheses

17x-21x-12+28=0

We add all the numbers together, and all the variables

-4x+16=0

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

-4x=-16

x=-16/-4

x=+4

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