Question

sa se rezolve sistemele de ecuatii: {3x+2y=118 x+5y=191 ; {5x+8y=14 x-4y=7 ; {2x-11y=-95 x-3y=0 ; {5x+3y=13 4x+11y=19 ; {23x+15y=4 intregi si 1/4 48x+45y=18 ; {7x-10y=0,1 11x-16y=0,1 va rooog

Answer 1

Răspuns:

x+3y=14

2y+z=14

x+3y+2y+z=14+14=28

3x+15y+3z=3(x+5y+z)=3*28=84

5x+11y-2z = 5x + 15y - 4y - 2z = 5(x+3y)-2(2y+2) = 5*14 - 2*14 =3*14=42

5x+19y+2z = 5x+15y+4y+2z=5(x+3y)+2(2y+z)=5*14+2*14=7*14=98