-8u-(-13u)=-20

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Solution for -8u-(-13u)=-20 equation: 



-8u-(-13u)=-20

We move all terms to the left:

-8u-(-13u)-(-20)=0

We add all the numbers together, and all the variables

-8u-(-13u)+20=0

We get rid of parentheses

-8u+13u+20=0

We add all the numbers together, and all the variables

5u+20=0

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

5u=-20

u=-20/5

u=-4

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