Răspuns:
a/11=b/3=>3a=11b=>a=11b/3
Inlocium si obținem :
11b/3+b=56
Aducem la același numitor :
11b+3b=56
14b=168
b=168:14
b=12
a+12=56=>a=56-12=>a=44
B)
11b/3-b=8/10
33b-30b=24
3b=24
b=24:3
b=8
a-8=0,8
a=8,8
C)
3a+b=36
3*11b/3+b=36
33b+3b=108
36b=108
b=108:36
b=3
3a+3=36
3a=36-3
3a=33
a=11
