y=(7x+9)(x-1)

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Solution for y=(7x+9)(x-1) equation: 


Simplifying
y = (7x + 9)(x + -1)

Reorder the terms:
y = (9 + 7x)(x + -1)

Reorder the terms:
y = (9 + 7x)(-1 + x)

Multiply (9 + 7x) * (-1 + x)
y = (9(-1 + x) + 7x * (-1 + x))
y = ((-1 * 9 + x * 9) + 7x * (-1 + x))
y = ((-9 + 9x) + 7x * (-1 + x))
y = (-9 + 9x + (-1 * 7x + x * 7x))
y = (-9 + 9x + (-7x + 7x2))

Combine like terms: 9x + -7x = 2x
y = (-9 + 2x + 7x2)

Solving
y = -9 + 2x + 7x2

Solving for variable 'y'.

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

Simplifying
y = -9 + 2x + 7x2

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