y=(4x+7u)(7x-u-1)

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Solution for y=(4x+7u)(7x-u-1) equation: 


Simplifying
y = (4x + 7u)(7x + -1u + -1)

Reorder the terms:
y = (7u + 4x)(7x + -1u + -1)

Reorder the terms:
y = (7u + 4x)(-1 + -1u + 7x)

Multiply (7u + 4x) * (-1 + -1u + 7x)
y = (7u * (-1 + -1u + 7x) + 4x * (-1 + -1u + 7x))
y = ((-1 * 7u + -1u * 7u + 7x * 7u) + 4x * (-1 + -1u + 7x))

Reorder the terms:
y = ((-7u + 49ux + -7u2) + 4x * (-1 + -1u + 7x))
y = ((-7u + 49ux + -7u2) + 4x * (-1 + -1u + 7x))
y = (-7u + 49ux + -7u2 + (-1 * 4x + -1u * 4x + 7x * 4x))

Reorder the terms:
y = (-7u + 49ux + -7u2 + (-4ux + -4x + 28x2))
y = (-7u + 49ux + -7u2 + (-4ux + -4x + 28x2))

Reorder the terms:
y = (-7u + 49ux + -4ux + -7u2 + -4x + 28x2)

Combine like terms: 49ux + -4ux = 45ux
y = (-7u + 45ux + -7u2 + -4x + 28x2)

Solving
y = -7u + 45ux + -7u2 + -4x + 28x2

Solving for variable 'y'.

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

Simplifying
y = -7u + 45ux + -7u2 + -4x + 28x2

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