4s-(-2s)-(-s)+(-20)=-13

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Solution for 4s-(-2s)-(-s)+(-20)=-13 equation: 



4s-(-2s)-(-s)+(-20)=-13

We move all terms to the left:

4s-(-2s)-(-s)+(-20)-(-13)=0

We add all the numbers together, and all the variables

4s-(-2s)-(-1s)+(-20)-(-13)=0

We add all the numbers together, and all the variables

4s-(-2s)-(-1s)-7=0

We get rid of parentheses

4s+2s+1s-7=0

We add all the numbers together, and all the variables

7s-7=0

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

7s=7

s=7/7

s=1

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