Question

5x + y = 20
x/4 - y/2 = 6 ​

Answer 1

Resposta:

×=24/11

y=100/11

Explicação passo-a-passo:

×/4-y/2=6

(×-2y)/4=6

×-2y=24

×=24+2y

5(24+2y) + y =20

120+10y +y=20

120+11y=20

11y=20-120

11y=-100

y=-100/11

5×+y=20

5×+100/11=20

(55×+100)/11=20

55×+100=20.11

55×+100=220

55×=120

×=120/55

×=24/11