7s-9s+4s=-8

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Solution for 7s-9s+4s=-8 equation: 



7s-9s+4s=-8

We move all terms to the left:

7s-9s+4s-(-8)=0

We add all the numbers together, and all the variables

2s+8=0

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

2s=-8

s=-8/2

s=-4

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