x-13=-4-21

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Solution for x-13=-4-21 equation: 



x-13=-4-21

We move all terms to the left:

x-13-(-4-21)=0

We add all the numbers together, and all the variables

x-13-(-25)=0

We add all the numbers together, and all the variables

x+12=0

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

x=-12

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