Question

resolver 7××3y =20 5×+2y = 14 Indicar : " x/y"​

Answer 1

Respuesta:

7x+3y=20

5x+2y=14

5x+2y=14

5x=14-2y

x=14-2y/5

7x+3y=20

7(14-2y/5)+3y=20

98-14y+15y=100

-14y+15y=100-98

y=2

5x+2y=14

5x+2(2)=14

5x+4=14

5x=14-4

5x=10

x=2

x/y

2/2=1