Question

Se considera ecuatia 7x+5y=-3.Stabiliti daca perechile (-4;5);(1;-2);(-3;1);(6;9);(2;3) sunt solutii ale acestei ecuatii.Va rog

Answer 1

7*(-4)+5*5=-28+25=-3 A
7*1+5*(-2)=7-10=-3 A
7*(-3)+5*1=-21+5=-16 F
7*6+5*9=42+45=87 F
7*2+5*3=14+15=29 F