3(s+5)=21

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Solution for 3(s+5)=21 equation:


Simplifying
3(s + 5) = 21

Reorder the terms:
3(5 + s) = 21
(5 * 3 + s * 3) = 21
(15 + 3s) = 21

Solving
15 + 3s = 21

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 + 3s = 21 + -15

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

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

Divide each side by '3'.
s = 2

Simplifying
s = 2

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