3s+9s-78=180

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Solution for 3s+9s-78=180 equation: 



3s+9s-78=180

We move all terms to the left:

3s+9s-78-(180)=0

We add all the numbers together, and all the variables

12s-258=0

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

12s=258

s=258/12

s=21+1/2

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