Question

Pfv Digita a resposta e a conta pfv

Resolva Equaçao de Primeiro Grau (Sistema De Adiçao)

$\left \{ {{2x + y = 4} \atop {4x - 3y = 3}} \right.$

Answer 1

x=4-y
4.(4-y)-3y=3

12-4y-3y=3
-y=3-12
-y=-9 .(-1)
y=9

2x+9=4
2x=4-9
2x=-5
x=-5/2
x=-2,5

2.(-2,5)+9=4
-5+9=4

S[-2,5,9]