20s-11s-7s+2s=4

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Solution for 20s-11s-7s+2s=4 equation: 



20s-11s-7s+2s=4

We move all terms to the left:

20s-11s-7s+2s-(4)=0

We add all the numbers together, and all the variables

4s-4=0

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

4s=4

s=4/4

s=1

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