[1azer]

الحل

u1*u2=144

u1+u2+u3=96

u1+u2+u3=3u2
3u2=96
u2=96/3=32

u1*u2=144
u1+32+u3=96

u1*32=144
u1+u3=64

u1=4.5
4.5+u3=64

u1=4.5
u3=59.5

و منه

u1=4.5
u2=32
u3=59.5

الاساس

59.5-32=27.5
32-4.5=27.5

ومنه

r=27.5

والله اعلم