-5x-y(y-4x)=21

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Solution for -5x-y(y-4x)=21 equation: 


Simplifying
-5x + -1y(y + -4x) = 21

Reorder the terms:
-5x + -1y(-4x + y) = 21
-5x + (-4x * -1y + y * -1y) = 21
-5x + (4xy + -1y2) = 21

Solving
-5x + 4xy + -1y2 = 21

Solving for variable 'x'.

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

Add 'y2' to each side of the equation.
-5x + 4xy + -1y2 + y2 = 21 + y2

Combine like terms: -1y2 + y2 = 0
-5x + 4xy + 0 = 21 + y2
-5x + 4xy = 21 + y2

Reorder the terms:
-21 + -5x + 4xy + -1y2 = 21 + y2 + -21 + -1y2

Reorder the terms:
-21 + -5x + 4xy + -1y2 = 21 + -21 + y2 + -1y2

Combine like terms: 21 + -21 = 0
-21 + -5x + 4xy + -1y2 = 0 + y2 + -1y2
-21 + -5x + 4xy + -1y2 = y2 + -1y2

Combine like terms: y2 + -1y2 = 0
-21 + -5x + 4xy + -1y2 = 0

The solution to this equation could not be determined.

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