8s-21=5s-15

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Solution for 8s-21=5s-15 equation:


Simplifying
8s + -21 = 5s + -15

Reorder the terms:
-21 + 8s = 5s + -15

Reorder the terms:
-21 + 8s = -15 + 5s

Solving
-21 + 8s = -15 + 5s

Solving for variable 's'.

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

Add '-5s' to each side of the equation.
-21 + 8s + -5s = -15 + 5s + -5s

Combine like terms: 8s + -5s = 3s
-21 + 3s = -15 + 5s + -5s

Combine like terms: 5s + -5s = 0
-21 + 3s = -15 + 0
-21 + 3s = -15

Add '21' to each side of the equation.
-21 + 21 + 3s = -15 + 21

Combine like terms: -21 + 21 = 0
0 + 3s = -15 + 21
3s = -15 + 21

Combine like terms: -15 + 21 = 6
3s = 6

Divide each side by '3'.
s = 2

Simplifying
s = 2

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