3 years ago

If 3x - y = 3 and -x + y = 3 then xy=___?

Mathematics

1 answer:

mamaluj [8]3 years ago

5 0

First find x and y.

Solve system of equations by elimination.

3x-y=3

+(-x+y=3)

---------------

2x=6

x=3

Now plug in x into one of the equations to find y.

-3+y=3

y=6

xy=3x6=18

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