7x-4=-21

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Solution for 7x-4=-21 equation: 



7x-4=-21

We move all terms to the left:

7x-4-(-21)=0

We add all the numbers together, and all the variables

7x+17=0

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

7x=-17

x=-17/7

x=-2+3/7

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