3x-9-2x-4=-21

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Solution for 3x-9-2x-4=-21 equation: 



3x-9-2x-4=-21

We move all terms to the left:

3x-9-2x-4-(-21)=0

We add all the numbers together, and all the variables

x+8=0

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

x=-8

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