Question

3x-2y=4
x+4y=5




ajuda ai ​

Answer 1

Resposta:

3x-2y=4

x+4y=5 ---> x=5-4y

3x-2y=4

3(5-4y)-2y=4

15-12y-2y=4

-14y=4-15

-14y=-11

y=-11/-14

y=11/14

x+4y=5

x+4(11/14)=5

x+44/14=5

x=5-44/14

x=70-44/14

x=26/14

x+4y=5

26/14+4(11/14)=5

26/14+44/14=5

70/14=5

5=5

Certíssimo