4x+21=-7

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Solution for 4x+21=-7 equation: 



4x+21=-7

We move all terms to the left:

4x+21-(-7)=0

We add all the numbers together, and all the variables

4x+28=0

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

4x=-28

x=-28/4

x=-7

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