y=(7x-1)(x+3)

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Solution for y=(7x-1)(x+3) equation: 


Simplifying
y = (7x + -1)(x + 3)

Reorder the terms:
y = (-1 + 7x)(x + 3)

Reorder the terms:
y = (-1 + 7x)(3 + x)

Multiply (-1 + 7x) * (3 + x)
y = (-1(3 + x) + 7x * (3 + x))
y = ((3 * -1 + x * -1) + 7x * (3 + x))
y = ((-3 + -1x) + 7x * (3 + x))
y = (-3 + -1x + (3 * 7x + x * 7x))
y = (-3 + -1x + (21x + 7x2))

Combine like terms: -1x + 21x = 20x
y = (-3 + 20x + 7x2)

Solving
y = -3 + 20x + 7x2

Solving for variable 'y'.

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

Simplifying
y = -3 + 20x + 7x2

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