18s-42=15s-18

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Solution for 18s-42=15s-18 equation:


Simplifying
18s + -42 = 15s + -18

Reorder the terms:
-42 + 18s = 15s + -18

Reorder the terms:
-42 + 18s = -18 + 15s

Solving
-42 + 18s = -18 + 15s

Solving for variable 's'.

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

Add '-15s' to each side of the equation.
-42 + 18s + -15s = -18 + 15s + -15s

Combine like terms: 18s + -15s = 3s
-42 + 3s = -18 + 15s + -15s

Combine like terms: 15s + -15s = 0
-42 + 3s = -18 + 0
-42 + 3s = -18

Add '42' to each side of the equation.
-42 + 42 + 3s = -18 + 42

Combine like terms: -42 + 42 = 0
0 + 3s = -18 + 42
3s = -18 + 42

Combine like terms: -18 + 42 = 24
3s = 24

Divide each side by '3'.
s = 8

Simplifying
s = 8

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