6x+21=-9

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Solution for 6x+21=-9 equation: 



6x+21=-9

We move all terms to the left:

6x+21-(-9)=0

We add all the numbers together, and all the variables

6x+30=0

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

6x=-30

x=-30/6

x=-5

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