112% ........................................739,2
100%.........................................x
[tex] \frac{112}{100} = \frac{739,2}{x} [/tex] ⇒ x=[tex] \frac{100×739,2}{112} [/tex]=[tex] \frac{73920}{112} = [/tex] 660
110% ........................................660
100% ........................................y
[tex] \frac{110}{100} = \frac{660}{y} [/tex] ⇒ y=[tex] \frac{100×660}{110} [/tex]=[tex] \frac{66000}{110} [/tex]=600
Raspuns: la inceput, telefonul costa 600 de lei.
