2n+3=20

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Solution for 2n+3=20 equation: 


Simplifying
2n + 3 = 20

Reorder the terms:
3 + 2n = 20

Solving
3 + 2n = 20

Solving for variable 'n'.

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

Add '-3' to each side of the equation.
3 + -3 + 2n = 20 + -3

Combine like terms: 3 + -3 = 0
0 + 2n = 20 + -3
2n = 20 + -3

Combine like terms: 20 + -3 = 17
2n = 17

Divide each side by '2'.
n = 8.5

Simplifying
n = 8.5

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