Question

x-y=2 2x-3y=-1

Answer 1

x-y=2

2x-3y=-1  

х=у+2

2(у+2)-3у=-1  

х=у+2   

2у+4-3у=-1

х=у+2 

-у=-5  

х=у+2 

у=5  

х=7

у=5    

Answer 2

x-y=2 2x-3y=-1 x-4y=-3 x-y=2 x=2+y 2+y-4y=-3 -3y=-5 x=2+y y=5/3 x=2+5/3 x=11/3 y=5/3