Question

Rezolvati prin metoda substitutiei 2x+y=-3
4x+3y=2
Va rog e urgent

Answer 1

Răspuns:

2x+y=-3 => y=-3-2x

4x+3y=2 => 4x+3*(-3-2x)=2 => 4x-9-6x=2 => -2x-9 = 2 => -2x = 11 => x= -11/2

=> y=-3-2*(-11/2) => y= -3 +11 => y=8

verificare: 2*(-11/2) +8 = -3 Adevarat