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If y equals 2x plus 1 and x equals 4y-2 what is the value of xy?

Updated: 12/11/2022

Wiki User

∙ 11y ago

Best Answer

We have

y = 2x + 1 = 2(4y-2) + 1 = 8y - 3 iff 7y = 3 iff y = 3/7 iff x = 4y - 2 = 12/7 - 2 = -2/7

(using "iff" for the double-arrow "is equivalent to" symbol which my PC won't copy).

Thus xy = (-2/7)(3/7) = -6/7.

Wiki User

∙ 11y ago

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