38s-21=61s-90

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Solution for 38s-21=61s-90 equation:


Simplifying
38s + -21 = 61s + -90

Reorder the terms:
-21 + 38s = 61s + -90

Reorder the terms:
-21 + 38s = -90 + 61s

Solving
-21 + 38s = -90 + 61s

Solving for variable 's'.

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

Add '-61s' to each side of the equation.
-21 + 38s + -61s = -90 + 61s + -61s

Combine like terms: 38s + -61s = -23s
-21 + -23s = -90 + 61s + -61s

Combine like terms: 61s + -61s = 0
-21 + -23s = -90 + 0
-21 + -23s = -90

Add '21' to each side of the equation.
-21 + 21 + -23s = -90 + 21

Combine like terms: -21 + 21 = 0
0 + -23s = -90 + 21
-23s = -90 + 21

Combine like terms: -90 + 21 = -69
-23s = -69

Divide each side by '-23'.
s = 3

Simplifying
s = 3

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