9+4x=-21

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Solution for 9+4x=-21 equation: 



9+4x=-21

We move all terms to the left:

9+4x-(-21)=0

We add all the numbers together, and all the variables

4x+30=0

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

4x=-30

x=-30/4

x=-7+1/2

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