Explicación paso a paso:
(x+3) / 9 = 8 /(x-3)
(x + 3 ) ( x - 3) = 72
x² - 9 = 72
x² = 81
x = 9
8 / (x+1) = y / (y+1)
8/ 10 = y / ( y+1)
8y +8 = 10y
8= 2y
4= y
x . y = 9 x 4 = 36 <------respuesta
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Verified answer
Explicación paso a paso:
(x+3) / 9 = 8 /(x-3)
(x + 3 ) ( x - 3) = 72
x² - 9 = 72
x² = 81
x = 9
8 / (x+1) = y / (y+1)
8/ 10 = y / ( y+1)
8y +8 = 10y
8= 2y
4= y
x . y = 9 x 4 = 36 <------respuesta