5s+4s=72

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Solution for 5s+4s=72 equation: 



5s+4s=72

We move all terms to the left:

5s+4s-(72)=0

We add all the numbers together, and all the variables

9s-72=0

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

9s=72

s=72/9

s=8

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