x+3y=6

2x-9y=7
can you please help me im getting the wrong answers.
thank you

3 answers

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.
well the answer is not 5 it is x=11 and y=-5/3
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.