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15s+23(1812-s)=31828
We move all terms to the left:
15s+23(1812-s)-(31828)=0
We add all the numbers together, and all the variables
15s+23(-1s+1812)-31828=0
We multiply parentheses
15s-23s+41676-31828=0
We add all the numbers together, and all the variables
-8s+9848=0
We move all terms containing s to the left, all other terms to the right
-8s=-9848
s=-9848/-8
s=+1231
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