4s+2w=21

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Solution for 4s+2w=21 equation: 


Simplifying
4s + 2w = 21

Solving
4s + 2w = 21

Solving for variable 's'.

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

Add '-2w' to each side of the equation.
4s + 2w + -2w = 21 + -2w

Combine like terms: 2w + -2w = 0
4s + 0 = 21 + -2w
4s = 21 + -2w

Divide each side by '4'.
s = 5.25 + -0.5w

Simplifying
s = 5.25 + -0.5w

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