Answer variants:
a1a2b1b2
a1a2=b1b2=c1c2
consistent
inconsistent
a1a2=b1b2c1c2
1. If the system of linear equations has a unique solution, then  
.
 
2. The system of equations 4x+10y+8=0 and 2x+5y+4=0 are
.