3s=7+1s

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Solution for 3s=7+1s equation: 


Simplifying
3s = 7 + 1s

Solving
3s = 7 + 1s

Solving for variable 's'.

Move all terms containing s to the left, all other terms to the right.

Add '-1s' to each side of the equation.
3s + -1s = 7 + 1s + -1s

Combine like terms: 3s + -1s = 2s
2s = 7 + 1s + -1s

Combine like terms: 1s + -1s = 0
2s = 7 + 0
2s = 7

Divide each side by '2'.
s = 3.5

Simplifying
s = 3.5

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