Question

verificati daca ecuatia x-3y+2=0 are ca solutie perechea de numere: a) (1;1) b) (0;-1) c) (-5;-1) d) (-2;0) e) (-3;-3)

Answer 1

x-3y+2=0

a) x=1; y=1 => 1-3+2=0 => -2+2=0, (A)
b)x=0; y=-1 => 0+3+2=0 => 5=0, (F)
c)x=-5; y=-1 => -5+3+2=0 => -5+5=0, (A)
d)x=-2; y=0 => -2+2=0, (A)
e) x=-3; y=-3 => -3+9+2=0 (F)