7x+x=-21

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Solution for 7x+x=-21 equation: 



7x+x=-21

We move all terms to the left:

7x+x-(-21)=0

We add all the numbers together, and all the variables

8x+21=0

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

8x=-21

x=-21/8

x=-2+5/8

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