12s+4=9s-20-18

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Solution for 12s+4=9s-20-18 equation: 



12s+4=9s-20-18

We move all terms to the left:

12s+4-(9s-20-18)=0

We add all the numbers together, and all the variables

12s-(9s-38)+4=0

We get rid of parentheses

12s-9s+38+4=0

We add all the numbers together, and all the variables

3s+42=0

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

3s=-42

s=-42/3

s=-14

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