Question 25222
For each one is all you have to do is plug in the x and y given to you, and find which pair solves BOTH equations.
x+y =5 
3x+4y =14
(1,4),(6,-1)or(3,2) 
(1)+(4)=5
This solves this equation, lets check the other;
3(1)+4(4)=14
3+16=14
No, it does not solve this one, so the ordered pair does not work.
Let's try the second;
6+-1=5
Yes,
3(6)+4(-1)=14
18-4=14
Yes, so this ordered pair works; now try the last;
3+2=5
3(3)+4(2)=14
9+8=14
No, so the only one is;
(6,-1)
Now you try the others;
=)