tolong di jawab no.7 pake cara

(10+x) / 9 = 10 / 6
(10 + x) = 10/6 x 9
10 + x = 15
x = 15 - 10
x = 5 cm

[tex] \frac{6}{9} = \frac{10}{10+x} [/tex]
6(10+x) = 9 (10)
60 + 6x = 90
6x = 30
x = 5