2n=2(n+2)-(n+1)

Solution for 2n=2(n+2)-(n+1) equation:

Simplifying
2n = 2(n + 2) + -1(n + 1)

Reorder the terms:
2n = 2(2 + n) + -1(n + 1)
2n = (2 * 2 + n * 2) + -1(n + 1)
2n = (4 + 2n) + -1(n + 1)

Reorder the terms:
2n = 4 + 2n + -1(1 + n)
2n = 4 + 2n + (1 * -1 + n * -1)
2n = 4 + 2n + (-1 + -1n)

Reorder the terms:
2n = 4 + -1 + 2n + -1n

Combine like terms: 4 + -1 = 3
2n = 3 + 2n + -1n

Combine like terms: 2n + -1n = 1n
2n = 3 + 1n

Solving
2n = 3 + 1n

Solving for variable 'n'.

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

Add '-1n' to each side of the equation.
2n + -1n = 3 + 1n + -1n

Combine like terms: 2n + -1n = 1n
1n = 3 + 1n + -1n

Combine like terms: 1n + -1n = 0
1n = 3 + 0
1n = 3

Divide each side by '1'.
n = 3

Simplifying
n = 3