s*7+39=130

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Solution for s*7+39=130 equation: 



s*7+39=130

We move all terms to the left:

s*7+39-(130)=0

We add all the numbers together, and all the variables

s*7-91=0

Wy multiply elements

7s-91=0

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

7s=91

s=91/7

s=13

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