Question

(A) -1
(B) 1
(C) 9
(D) 10
(E) 19

qual das alternativas?

Answer 1

x . 1/2 = x - 5
y . 4/3 = y + 3

x/2 = x - 5
x = 2x - 10

4y/3 = y + 3
4y = 3y + 9

x -2x = -10
-x = -10 ( -1)
x = 10

4y -3y = 9
y = 9

x - y =
10 - 9 = 1

Alternativa B.