13s+9=16+12s

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Solution for 13s+9=16+12s equation: 



13s+9=16+12s

We move all terms to the left:

13s+9-(16+12s)=0

We add all the numbers together, and all the variables

13s-(12s+16)+9=0

We get rid of parentheses

13s-12s-16+9=0

We add all the numbers together, and all the variables

s-7=0

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

s=7

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