Răspuns :
x = suma totala de bani
30 * x/100 + 35 = x
30x + 3500 = 100x
30x - 100x = - 3500
70x = 3500
x = 3500 : 70
x = 50 lei suma de bani
50 * 30/100 = 15 lei a cheltuit in prima zi
30 * x/100 + 35 = x
30x + 3500 = 100x
30x - 100x = - 3500
70x = 3500
x = 3500 : 70
x = 50 lei suma de bani
50 * 30/100 = 15 lei a cheltuit in prima zi
x=suma de bani
I zi-30/100x=3/10x
II zi-35lei
I+II=x
3/10x+35=x
3/10x-10/10x=-35
-7/10x=-35
x=-35•10/-7
x=50lei
I zi-3/10•50=15 lei
I zi-30/100x=3/10x
II zi-35lei
I+II=x
3/10x+35=x
3/10x-10/10x=-35
-7/10x=-35
x=-35•10/-7
x=50lei
I zi-3/10•50=15 lei