y=(200+10x)(40-x)

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Solution for y=(200+10x)(40-x) equation: 


Simplifying
y = (200 + 10x)(40 + -1x)

Multiply (200 + 10x) * (40 + -1x)
y = (200(40 + -1x) + 10x * (40 + -1x))
y = ((40 * 200 + -1x * 200) + 10x * (40 + -1x))
y = ((8000 + -200x) + 10x * (40 + -1x))
y = (8000 + -200x + (40 * 10x + -1x * 10x))
y = (8000 + -200x + (400x + -10x2))

Combine like terms: -200x + 400x = 200x
y = (8000 + 200x + -10x2)

Solving
y = 8000 + 200x + -10x2

Solving for variable 'y'.

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

Simplifying
y = 8000 + 200x + -10x2

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