👤

a+b=65
b=2a+5
raspunsul?


Răspuns :

a+2a+5=65
3a=65-5
3a=60
a=60:3
a=20
b=2*20 +5=45
a+b=65
b=2a+5
a+2a+5=65
3a=65-5
3a=60
a=60:3=20
b=2x20+5=40+5=45

a+b=20+45=65