Question

calcule os sistemas x+2y=5 2x+y=-2​

Answer 1

Explicação passo-a-passo:

×=5-2y

2.(5-2y)+y=-2

10-4y+y=-2

-4y+y=-2-10

-3y=-12(-1)

3y=12

y=12/3

y=4

×=5-2y

×=5-2.(4)

×=5-8

×=-3

Answer 2

Explicação passo-a-passo:

(x + 2y = 5

( 2x + y = - 2

x =5 - 2y

2.(5-2y)+y= -2

10-4y+y= - 2

-3y= - 2 -10

-3y= - 12

y= 12/3

y= 4

x + 2y= 5

x + 2.4=5

x + 8 = 5

x= 5 - 8

x= - 3

s ( -3 , 4)