Problem : Solve the following system of equations:

y + 4x=8  
5x + 2y=13  

(x, y) = (1, 4)

Problem : Solve the following system of equations:

2x + 2y=6  
12=2y - x  

(x, y) = (- 2, 5)

Problem : Solve the following system of equations:

4y + 2x=5  
x=8 - 2y  

No solutions. The system is inconsistent.

Problem : Solve the following system of equations:

2x + 2y=4  
5y - 3x=6  

(x, y) = (,)

Problem : Solve the following system of equations:

10x + 7y=49  
10y - x=70  

(x, y) = (0, 7)

Problem : Solve the following system of equations:

2x + 9y=0  
3x + 5y=17  

(x, y) = (9, - 2)