21s-5=20s

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Solution for 21s-5=20s equation:


Simplifying
21s + -5 = 20s

Reorder the terms:
-5 + 21s = 20s

Solving
-5 + 21s = 20s

Solving for variable 's'.

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

Add '-20s' to each side of the equation.
-5 + 21s + -20s = 20s + -20s

Combine like terms: 21s + -20s = 1s
-5 + 1s = 20s + -20s

Combine like terms: 20s + -20s = 0
-5 + 1s = 0

Add '5' to each side of the equation.
-5 + 5 + 1s = 0 + 5

Combine like terms: -5 + 5 = 0
0 + 1s = 0 + 5
1s = 0 + 5

Combine like terms: 0 + 5 = 5
1s = 5

Divide each side by '1'.
s = 5

Simplifying
s = 5

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