Question

È de geometria.. podem me ajudar

Answer 1

a)

(6+3)/x=6/8
9/x=6/8
9.8=6.x
72=6x
x=72/6
x=12


b)
36/AD=27/BD

BD=AD-10

36/AD=27/(AD-10)

36.(AD-10)=27.AD
36(x-10)=27x
36x-360=27x
36x-27x=360
9x=360
x=360/9
x=40