Răspuns :
3a/4=2b/3
9a=8b
a/b=9/8
a+b=3,4
a=9k
b=8k
9k+8k=17/5
17k=17/5
k=17/5:17
k=17/5•1/17
k=1/5
a=9•1/5
a=9/5
b=8•1/5
b=8/5
9a=8b
a/b=9/8
a+b=3,4
a=9k
b=8k
9k+8k=17/5
17k=17/5
k=17/5:17
k=17/5•1/17
k=1/5
a=9•1/5
a=9/5
b=8•1/5
b=8/5