y[n]=0.2x[n]-0.8y[n-1]-0.15y[n-2]

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Solution for y[n]=0.2x[n]-0.8y[n-1]-0.15y[n-2] equation:


Simplifying
y[n] = 0.2x[n] + -0.8y[n + -1] + -0.15y[n + -2]

Multiply y * n
ny = 0.2x[n] + -0.8y[n + -1] + -0.15y[n + -2]

Multiply x * n
ny = 0.2nx + -0.8y[n + -1] + -0.15y[n + -2]

Reorder the terms:
ny = 0.2nx + -0.8y[-1 + n] + -0.15y[n + -2]
ny = 0.2nx + [-1 * -0.8y + n * -0.8y] + -0.15y[n + -2]

Reorder the terms:
ny = 0.2nx + [-0.8ny + 0.8y] + -0.15y[n + -2]
ny = 0.2nx + [-0.8ny + 0.8y] + -0.15y[n + -2]

Reorder the terms:
ny = 0.2nx + -0.8ny + 0.8y + -0.15y[-2 + n]
ny = 0.2nx + -0.8ny + 0.8y + [-2 * -0.15y + n * -0.15y]

Reorder the terms:
ny = 0.2nx + -0.8ny + 0.8y + [-0.15ny + 0.3y]
ny = 0.2nx + -0.8ny + 0.8y + [-0.15ny + 0.3y]

Reorder the terms:
ny = 0.2nx + -0.8ny + -0.15ny + 0.8y + 0.3y

Combine like terms: -0.8ny + -0.15ny = -0.95ny
ny = 0.2nx + -0.95ny + 0.8y + 0.3y

Combine like terms: 0.8y + 0.3y = 1.1y
ny = 0.2nx + -0.95ny + 1.1y

Solving
ny = 0.2nx + -0.95ny + 1.1y

Solving for variable 'n'.

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

Add '-0.2nx' to each side of the equation.
-0.2nx + ny = 0.2nx + -0.95ny + -0.2nx + 1.1y

Reorder the terms:
-0.2nx + ny = 0.2nx + -0.2nx + -0.95ny + 1.1y

Combine like terms: 0.2nx + -0.2nx = 0.0
-0.2nx + ny = 0.0 + -0.95ny + 1.1y
-0.2nx + ny = -0.95ny + 1.1y

Add '0.95ny' to each side of the equation.
-0.2nx + ny + 0.95ny = -0.95ny + 0.95ny + 1.1y

Combine like terms: ny + 0.95ny = 1.95ny
-0.2nx + 1.95ny = -0.95ny + 0.95ny + 1.1y

Combine like terms: -0.95ny + 0.95ny = 0.00
-0.2nx + 1.95ny = 0.00 + 1.1y
-0.2nx + 1.95ny = 1.1y

Combine like terms: 1.1y + -1.1y = 0.0
-0.2nx + 1.95ny + -1.1y = 0.0

The solution to this equation could not be determined.

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