Răspuns :
Răspuns:
Explicație pas cu pas:
fie x,y cat a economisit in prima, a doua luna
x+y=750
y=2x
inlocuim ec.2 in 1
x+2x=750
3x=750
x=250 RON
y=2*250=500 RON
Răspuns:
[tex]a+b=750\\\\b=2a\\\\a+2a=750\\\\a=750:3= > a=250RON-prima.luna\\\\b=2*250=500RON-a2a.luna[/tex]