2n+3n+1=21

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Solution for 2n+3n+1=21 equation: 


Simplifying
2n + 3n + 1 = 21

Reorder the terms:
1 + 2n + 3n = 21

Combine like terms: 2n + 3n = 5n
1 + 5n = 21

Solving
1 + 5n = 21

Solving for variable 'n'.

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

Add '-1' to each side of the equation.
1 + -1 + 5n = 21 + -1

Combine like terms: 1 + -1 = 0
0 + 5n = 21 + -1
5n = 21 + -1

Combine like terms: 21 + -1 = 20
5n = 20

Divide each side by '5'.
n = 4

Simplifying
n = 4

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