tolong jawab caranya juga yaaa. Makasihh✨

tan 30 = x/AB
1/3√3 = x / AB.==> x = 1/3√3AB...(1)
tan 45 = (20+x)/AB
1 = (20+x)/AB
AB = (20-x).=> x = (20-AB)....(2). subsitusikan (1) ke (2), maka
1/3√3AB = 20 - AB
1/3√3AB + AB = 20
(1/3√3+1)AB = 20
AB = 20/(1/3√3+1)
= (20/3)√3 + 20