Question

dupa 2 majorari succesive,prima de 5% si a doua de 8%,un album costa 56,70lei.care a fost pretul initial?

Answer 1

(x+x*5%)+(x+x*5%)*8%=56,7
x+0,05x+1,05x*0,08=56,7
1,05x+0,084x=56,7
1,134x=56,7
x=56,7:1,134
x=50