y=(800+20x)(60-x)

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Solution for y=(800+20x)(60-x) equation: 


Simplifying
y = (800 + 20x)(60 + -1x)

Multiply (800 + 20x) * (60 + -1x)
y = (800(60 + -1x) + 20x * (60 + -1x))
y = ((60 * 800 + -1x * 800) + 20x * (60 + -1x))
y = ((48000 + -800x) + 20x * (60 + -1x))
y = (48000 + -800x + (60 * 20x + -1x * 20x))
y = (48000 + -800x + (1200x + -20x2))

Combine like terms: -800x + 1200x = 400x
y = (48000 + 400x + -20x2)

Solving
y = 48000 + 400x + -20x2

Solving for variable 'y'.

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

Simplifying
y = 48000 + 400x + -20x2

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