Question

me ajudem PF exercício com foto

Answer 1

   x          2x
------   =  ---------
x + 5       x + 20

x.(x + 20) = 2x.(x + 5)
x² + 20x = 2x² + 10x
0 = 2x² - x² + 10x - 20x
0 = x² - 10x
x² - 10x = 0
x(x - 10) = 0
x = 0

x - 10 = 0
x = 10


AB = x + x + 5 = 2x + 5

AB = 2x + 5
AB = 2.10 + 5
AB = 20 + 5
AB = 25

AB = 25

AC = 2x + x + 20 = 3x + 20
AC = 3x + 20
AC = 3.10 + 20
AC = 30 + 20
AC = 50

AC = 50
************************
R.:
AB = 25
AC = 50