Question

{3a-4b=9 a+4b=-1

Sistema de equacao​

Answer 1

Resposta:

(2,-0.75)

Explicação passo-a-passo:

{3a-4b=9

{a+4b=-1

a=-1-4b

3(-1-4b)-4b=9

-3-12b-4b=9

-12b-4b=9+3

-16b=12

b=12/-16

b=-0,75

a=-1-4(-0,75)

a=-1+3

a=2

(2,-0.75)