Question

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

Answer 1

{10x-7y=5si   -x²-2xy+x+3y+1=0          e){4x+2y-4=7   si   -3x-5y+3=-3        {20x+10y-20=35  si   -6x-10y+6=-6           14x-14=29  14x=15   x=15/14      f)  |x|=0 dacax=0   saux>_0      {|x|-y=5    si   |x|+y=7       {0-y=5   si 0+y=7