F. 4x + 5y = 15
    y = 2/2x - 3
G. 4x + 5y = 15
     y= 3/2x - 3
H. 5x + 4y = 12
     y = 2/3x - 3
J.  4x + 5y = 19
     y=2/3x - 13/3
                                             
                                          
                                          
                                       