3s+(-10s)+(-18s)+15s=(-20)

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Solution for 3s+(-10s)+(-18s)+15s=(-20) equation: 



3s+(-10s)+(-18s)+15s=(-20)

We move all terms to the left:

3s+(-10s)+(-18s)+15s-((-20))=0

We add all the numbers together, and all the variables

18s+(-10s)+(-18s)+20=0

We get rid of parentheses

18s-10s-18s+20=0

We add all the numbers together, and all the variables

-10s+20=0

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

-10s=-20

s=-20/-10

s=+2

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