Răspuns :
[tex]7~000~000+ \frac{12}{1\not00}*7~000~0{\not}00=7~000~000+840~000=7~840~000 [/tex]
100%+12%=112% exponate in Muzeul de Istorie
100%...........................................................................7000000
112%............................................................................... x%
x=112x7000000:100=7840000 exponate in Muzeul de Istorie
sau
7000000x12:100=840000 (12% din 7000000)
7000000+840000=7840000
100%...........................................................................7000000
112%............................................................................... x%
x=112x7000000:100=7840000 exponate in Muzeul de Istorie
sau
7000000x12:100=840000 (12% din 7000000)
7000000+840000=7840000