s*7+22=169

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Solution for s*7+22=169 equation: 



s*7+22=169

We move all terms to the left:

s*7+22-(169)=0

We add all the numbers together, and all the variables

s*7-147=0

Wy multiply elements

7s-147=0

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

7s=147

s=147/7

s=21

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