13=-2x-7

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Solution for 13=-2x-7 equation: 



13=-2x-7

We move all terms to the left:

13-(-2x-7)=0

We get rid of parentheses

2x+7+13=0

We add all the numbers together, and all the variables

2x+20=0

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

2x=-20

x=-20/2

x=-10

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