Rezolvati sistemele:
a) 3(2x-y)+4(x-y)=5                                e) 3(x+y-1)+(x-y-1)=7             f) |x|-y=5
   -x(x+2y-3)-(2x-3y-1)=0                            -4(x+y-1)+x-y- 1)= -3            |x|+y=7

j) |x|+2|y|=3
   |x|-2|y|= -4    
AJUTATIMA  VA ROG FRUMOS AM NEVOIE URGENT