Question

2. Qual o valor de X e Y no caso abaixo.
(x+y=5 2×-y=9​

Answer 1

X+Y=5

2x-Y=9

X = 5-y

2(5-y) - y = 9

10-2y-y = 9

-3y = 9 - 10

-3y = -1

Y = -1/3

2x + 1/3 = 9

6x + 1 = 27

6x = 27-6

x = 21/6:3

x = 7/2