Asked by Anonymous

x+3y=6
2x-9y=7
can you please help me im getting the wrong answers.
thank you
Answered by drwls
Triple both sides of the first equation; them add it to the last equation. That will get rid of the y term.

3x + 9y = 18
2x - 9y = 7
------------
5x = 25

Surely you can take it from there.

Once you know x, use either equation to solve for y. They will give the same answer.
Answered by Anonymous
well the answer is not 5 it is x=11 and y=-5/3
Answered by drwls
11 + 3*(-5/3) = 6, which is OK, but
2*11 -9*(-5/3) = 22 + 15 = 37, not 7

Either your "book" answer is wrong or you copied the problem incorrectly.

If the second equation were
2x + 9y = 7,
you get the answers you quoted.
There are no AI answers yet. The ability to request AI answers is coming soon!