Question

dupa doua cresteri consecutive de preturi , prima de 10 % a doua de 12% un telefon mobil costa 739,2 lei

cat a costat telefonul inainte

Answer 1

x-pretul initial
10% din x= 10/100 *x= 1/10 * x=  x/10 -marirea 

x+x/10= (10x+x)/10=  11x/10-noul pret

12% din 11x/10=  12/100 *11x/10=  3/25 * 11x/10=  33x/250 -marirea

11x/10 +33x/250=  (275x+33x)/250= 308x/250

308x/250=739,2

x=250*739,2/308
x=184 800/308
x=600