2[n+8]=20

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Solution for 2[n+8]=20 equation: 


Simplifying
2[n + 8] = 20

Reorder the terms:
2[8 + n] = 20
[8 * 2 + n * 2] = 20
[16 + 2n] = 20

Solving
16 + 2n = 20

Solving for variable 'n'.

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

Add '-16' to each side of the equation.
16 + -16 + 2n = 20 + -16

Combine like terms: 16 + -16 = 0
0 + 2n = 20 + -16
2n = 20 + -16

Combine like terms: 20 + -16 = 4
2n = 4

Divide each side by '2'.
n = 2

Simplifying
n = 2

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