Question

observando que ∆ABC ~ ∆DEF, qual é o valor de x?

Answer 1

1 / 1 - x = 3 / x

1 * x = 3 * (1 - x)

x = 3 - 3x

x + 3x = 3

4x = 3

x = 3/4

Answer 2

1 / 1 - x = 3 / x

x + 3x = 3

4x = 3

x = 3/4

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