2*x-7=-21

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Solution for 2*x-7=-21 equation: 



2x-7=-21

We move all terms to the left:

2x-7-(-21)=0

We add all the numbers together, and all the variables

2x+14=0

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

2x=-14

x=-14/2

x=-7

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