21=4s-3

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Solution for 21=4s-3 equation:


Simplifying
21 = 4s + -3

Reorder the terms:
21 = -3 + 4s

Solving
21 = -3 + 4s

Solving for variable 's'.

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

Add '-4s' to each side of the equation.
21 + -4s = -3 + 4s + -4s

Combine like terms: 4s + -4s = 0
21 + -4s = -3 + 0
21 + -4s = -3

Add '-21' to each side of the equation.
21 + -21 + -4s = -3 + -21

Combine like terms: 21 + -21 = 0
0 + -4s = -3 + -21
-4s = -3 + -21

Combine like terms: -3 + -21 = -24
-4s = -24

Divide each side by '-4'.
s = 6

Simplifying
s = 6

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