If 3x+4y=7 and 2x-3y=67, what is the value of xy?

If 3x+4y=7 and 2x-3y+67, what is the value of xy?
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3x+4y=7, 2x-3y=67. Solve for x and y:

Triple the first equation: 9x+12y=21; quadruple the second equation: 8x-12y=268.

Add these two equations: 17x=289, x=289/17=17.

2x-3y=67, so 34-3y=67, 3y=-33, y=-11.

Therefore xy=-187.
by Top Rated User (1.2m points)

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