9+9s-4=7s

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Solution for 9+9s-4=7s equation: 



9+9s-4=7s

We move all terms to the left:

9+9s-4-(7s)=0

We add all the numbers together, and all the variables

2s+5=0

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

2s=-5

s=-5/2

s=-2+1/2

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