## malutella 3 years ago Solve these systems of equations 7x+2y= -3 and -14x-4y=6 . I got y=3/2, x= -6/7 am I right ?

1. AravindG

hmm multiply first equation with 2

2. AravindG

14x+4y=-6

3. AravindG

14x+4y+6=0

4. malutella

well yeah i did that multiplying it by -2 so that when i add it in the second question -14x and 14X cancel out (I'm using linear combinations here)

5. AravindG

-14x+4y-6=0

6. malutella

*equation

7. AravindG

if thats the case both x and y cancels out!!

8. AravindG

isnt it?

9. malutella

In the first equation you do 2y times -2 = -4y. Now in the 2nd equation you have -4y soo -4y+ -4y is -8y which means that the ys don't cancel out

10. AravindG

nt really :)

11. AravindG

infact both these lines are the same !!

12. AravindG

take a look at the graph

13. AravindG
14. malutella

yes I see...so there's something I'm doing wrong in my math here !

15. malutella

u were right they are the same line!

16. AravindG

take a look at the question you have posted !!

17. AravindG

:P yep makes sure u type the qns right :)