y[n]=x[n-1]+2x[n-2]

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Solution for y[n]=x[n-1]+2x[n-2] equation:


Simplifying
y[n] = x[n + -1] + 2x[n + -2]

Multiply y * n
ny = x[n + -1] + 2x[n + -2]

Reorder the terms:
ny = x[-1 + n] + 2x[n + -2]
ny = [-1 * x + n * x] + 2x[n + -2]

Reorder the terms:
ny = [nx + -1x] + 2x[n + -2]
ny = [nx + -1x] + 2x[n + -2]

Reorder the terms:
ny = nx + -1x + 2x[-2 + n]
ny = nx + -1x + [-2 * 2x + n * 2x]

Reorder the terms:
ny = nx + -1x + [2nx + -4x]
ny = nx + -1x + [2nx + -4x]

Reorder the terms:
ny = nx + 2nx + -1x + -4x

Combine like terms: nx + 2nx = 3nx
ny = 3nx + -1x + -4x

Combine like terms: -1x + -4x = -5x
ny = 3nx + -5x

Solving
ny = 3nx + -5x

Solving for variable 'n'.

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

Add '-3nx' to each side of the equation.
-3nx + ny = 3nx + -3nx + -5x

Combine like terms: 3nx + -3nx = 0
-3nx + ny = 0 + -5x
-3nx + ny = -5x

Combine like terms: -5x + 5x = 0
-3nx + ny + 5x = 0

The solution to this equation could not be determined.

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