4x+21=x-28

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Solution for 4x+21=x-28 equation: 



4x+21=x-28

We move all terms to the left:

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

We get rid of parentheses

4x-x+28+21=0

We add all the numbers together, and all the variables

3x+49=0

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

3x=-49

x=-49/3

x=-16+1/3

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