-7x-21=-49

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Solution for -7x-21=-49 equation: 



-7x-21=-49

We move all terms to the left:

-7x-21-(-49)=0

We add all the numbers together, and all the variables

-7x+28=0

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

-7x=-28

x=-28/-7

x=+4

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