Răspuns :
a + a:2 + a:4 = 77
4 x a + 2x a + a = 77 x 4
7 x a =77 x 4
a = 77:7 x 4
a = 44
4 x a + 2x a + a = 77 x 4
7 x a =77 x 4
a = 77:7 x 4
a = 44
[tex]a+ \frac{a}{2} + \frac{a}{4} =77 aducem.la.acelasi.numitor.comun \\ \frac{4a}{4} + \frac{2a}{4} + \frac{a}{4} = \frac{308}{4} \\ 7a=308 \\ a=308:7 \\ a=44[/tex]
