3=7-2s

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Solution for 3=7-2s equation:


Simplifying
3 = 7 + -2s

Solving
3 = 7 + -2s

Solving for variable 's'.

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

Add '2s' to each side of the equation.
3 + 2s = 7 + -2s + 2s

Combine like terms: -2s + 2s = 0
3 + 2s = 7 + 0
3 + 2s = 7

Add '-3' to each side of the equation.
3 + -3 + 2s = 7 + -3

Combine like terms: 3 + -3 = 0
0 + 2s = 7 + -3
2s = 7 + -3

Combine like terms: 7 + -3 = 4
2s = 4

Divide each side by '2'.
s = 2

Simplifying
s = 2

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