20=3(n)+n(2)

Solution for 20=3(n)+n(2) equation:

Simplifying
20 = 3(n) + n(2)

Reorder the terms for easier multiplication:
20 = 3n + 2n

Combine like terms: 3n + 2n = 5n
20 = 5n

Solving
20 = 5n

Solving for variable 'n'.

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

Add '-5n' to each side of the equation.
20 + -5n = 5n + -5n

Combine like terms: 5n + -5n = 0
20 + -5n = 0

Add '-20' to each side of the equation.
20 + -20 + -5n = 0 + -20

Combine like terms: 20 + -20 = 0
0 + -5n = 0 + -20
-5n = 0 + -20

Combine like terms: 0 + -20 = -20
-5n = -20

Divide each side by '-5'.
n = 4

Simplifying
n = 4