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12/8+4=s=3
We move all terms to the left:
12/8+4-(s)=0
We add all the numbers together, and all the variables
-1s+4+12/8=0
We multiply all the terms by the denominator
-1s*8+12+4*8=0
We add all the numbers together, and all the variables
-1s*8+44=0
Wy multiply elements
-8s+44=0
We move all terms containing s to the left, all other terms to the right
-8s=-44
s=-44/-8
s=5+1/2
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