-4(s+-9)=20

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Solution for -4(s+-9)=20 equation: 



-4(s+-9)=20

We move all terms to the left:

-4(s+-9)-(20)=0

We add all the numbers together, and all the variables

-4(s-9)-20=0

We multiply parentheses

-4s+36-20=0

We add all the numbers together, and all the variables

-4s+16=0

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

-4s=-16

s=-16/-4

s=+4

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