S+15=20

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Solution for S+15=20 equation: 


Simplifying
S + 15 = 20

Reorder the terms:
15 + S = 20

Solving
15 + S = 20

Solving for variable 'S'.

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

Add '-15' to each side of the equation.
15 + -15 + S = 20 + -15

Combine like terms: 15 + -15 = 0
0 + S = 20 + -15
S = 20 + -15

Combine like terms: 20 + -15 = 5
S = 5

Simplifying
S = 5

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