3 years ago

Three times a number minus another number is -3. The sum of the numbers is 11. Find the numbers

Mathematics

1 answer:

MatroZZZ [7]3 years ago

8 0

The first equation is

$3x-y=-3$

The second equation is

$x+y=11$

If you sum the two equations you'll cancel y:

$4x=8 \iff x=2$

And since the sum must be 11, we have y=9.

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