3x+21=-51

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Solution for 3x+21=-51 equation: 



3x+21=-51

We move all terms to the left:

3x+21-(-51)=0

We add all the numbers together, and all the variables

3x+72=0

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

3x=-72

x=-72/3

x=-24

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