Respuesta :

4x/15 = 60/x
4x^2 = 900
x^2 = 225
x = 15
4x/15 = 60/x

4x² = 60 * 15

x² = 60 * 15 / 4 = 15 * 15 = 225

x = 15, -15

Hope it helps!

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