How many solutions are there to the following system of equations?

2x + 6y = 4
5x + 15y = 10

Question

How many solutions are there to the following system of equations? 
 
2x + 6y = 4 
5x + 15y = 10

anonymous · Answer

A.
infinitely many
 
 B.
0
 
 C.
2
 
 D.
1

amoodarya · Answer

divide 1st by 2
divide second by 5

anonymous · Answer

1, Discriminant = 49 - (4*5*3) = -11
2, nemaproblema:
x² - 7/5x = -3/5
(x - 7/10)² - 0.49 = -0.6
(x - 7/10)² = -0.11

Both indicates there is no solution.

amoodarya · Answer

2x + 6y = 4--->x+3y=2
5x + 15y = 10--->x+3y=2
and now you have 2 variables and one equation 
second is the same as first

anonymous · Answer

So the answer is A?

amoodarya · Answer

can you go on ?

anonymous · Answer

What do you mean?

amoodarya · Answer

yes
there is infinite solution

anonymous · Answer

ok Thanks for the help!

amoodarya · Answer

when variables are more than equations 
there is infinite solution