Question

ex 4 plzzzzzzzzzzzzzzzzzz

Answer 1

a-varsta Alexandrei
m-varsta mamei
a=1/5 *m => a =m/5
(a+8)*3=m+8 =>inlocuim a => (m/5+8)*3=m+8 -aducem la acelasi numitor  in paranteza
=>3m+120/5=5m+40/5 -renuntam la numitor =>3m+120=5m+40=>-2m=-80-efectuam impartirea =>40 (varsta mamei)
a=m/5 =>40/5=8 (varsta Alexandrei)
Coronita ? :)