3(5n-8)=21

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Solution for 3(5n-8)=21 equation: 


Simplifying
3(5n + -8) = 21

Reorder the terms:
3(-8 + 5n) = 21
(-8 * 3 + 5n * 3) = 21
(-24 + 15n) = 21

Solving
-24 + 15n = 21

Solving for variable 'n'.

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

Add '24' to each side of the equation.
-24 + 24 + 15n = 21 + 24

Combine like terms: -24 + 24 = 0
0 + 15n = 21 + 24
15n = 21 + 24

Combine like terms: 21 + 24 = 45
15n = 45

Divide each side by '15'.
n = 3

Simplifying
n = 3

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