nmr 20 beserta cara...

x/2=(x+3,9)/5
5x=2x+7,8
3x=7,8
x=2,6cm

AP/AB = AQ/AM
X/3,9+X = 2/2+3
X/3,9+X = 2/5
5X = 2(3,9+X)
5X = 7,8 + 2X
5X - 2X = 7,8
3X = 7,8
X = 7,8/3
X = 2,6 cm

Mohon dikoreksi apabila ada kesalahan.