Răspuns :
a+b=65
a=5+2b
a+b=65
5+2b+b=65
3b+5=65
3b=65-5=>3b=60=>b=60:3=>b=20
a=5+2b=>a=5+2x20=>a=5+40=>a=45
Cu placere!
a=5+2b
a+b=65
5+2b+b=65
3b+5=65
3b=65-5=>3b=60=>b=60:3=>b=20
a=5+2b=>a=5+2x20=>a=5+40=>a=45
Cu placere!