Question

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determine os valores de x e y

Answer 1

9 : x = 10 : 5
9 . 5 = 10x
45 = 10x
x = 45 : 10
x = 4,5

10 : 5 = 6 : y
10y = 5 . 6
10y = 30
y = 30 : 10
y = 3