Răspuns :
X = suma de bani
65/100 * x cheltuiala
x - 65/100*x = 175
aducem la numitor comun si obtinem:
100x - 65x= 17500
35x=17500
x= 500.
65/100 * x cheltuiala
x - 65/100*x = 175
aducem la numitor comun si obtinem:
100x - 65x= 17500
35x=17500
x= 500.
65x/100+175 =x numitor100
65x+17500 =100x
100x-65x =17500
35x =17500
x =500 lei
65x+17500 =100x
100x-65x =17500
35x =17500
x =500 lei