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[RESOLVED] solving equation

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I have an equation that I'm trying to solve:

y =- x²⁄16 + 21x⁄16 + 11⁄8

Multiply through by 16:
16y = -x² + 21x + 22

But that's as far as I can get.
I'd understand it if it was:

y = -x² + 21x + 22 = 0

But I'm not sure with 16y.

Can anyone explain how to simplify this equation?
Thanks for your help.

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