3[2n+1]-7=20

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Solution for 3[2n+1]-7=20 equation:


Simplifying
3[2n + 1] + -7 = 20

Reorder the terms:
3[1 + 2n] + -7 = 20
[1 * 3 + 2n * 3] + -7 = 20
[3 + 6n] + -7 = 20

Reorder the terms:
3 + -7 + 6n = 20

Combine like terms: 3 + -7 = -4
-4 + 6n = 20

Solving
-4 + 6n = 20

Solving for variable 'n'.

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

Add '4' to each side of the equation.
-4 + 4 + 6n = 20 + 4

Combine like terms: -4 + 4 = 0
0 + 6n = 20 + 4
6n = 20 + 4

Combine like terms: 20 + 4 = 24
6n = 24

Divide each side by '6'.
n = 4

Simplifying
n = 4

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