rozwiązanie w załączniku
Odpowiedź:
a + b + c = 80
c = 12 + 16 = 28
==================
oraz
[tex]\frac{a}{12} = \frac{b}{16} \\12 b = 16 a / : 12\\b = \frac{16}{12} a = \frac{4}{3} a[/tex]
więc
a + b + c = a + [tex]\frac{4}{3} a + 28 = 80[/tex]
[tex]\frac{7}{3} a = 52 / * \frac{3}{7}[/tex]
a = [tex]\frac{156}{7} =[/tex] 22 [tex]\frac{2}{7}[/tex]
--------------------
b = [tex]\frac{4}{3} *\frac{156}{7} =\frac{208}{7} = 29 \frac{5}{7}[/tex]
--------------------------------------
Odp. 22 [tex]\frac{2}{7}[/tex] cm, [tex]29 \frac{5}{7}[/tex] cm , 28 cm
===========================
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rozwiązanie w załączniku
Odpowiedź:
a + b + c = 80
c = 12 + 16 = 28
==================
oraz
[tex]\frac{a}{12} = \frac{b}{16} \\12 b = 16 a / : 12\\b = \frac{16}{12} a = \frac{4}{3} a[/tex]
więc
a + b + c = a + [tex]\frac{4}{3} a + 28 = 80[/tex]
[tex]\frac{7}{3} a = 52 / * \frac{3}{7}[/tex]
a = [tex]\frac{156}{7} =[/tex] 22 [tex]\frac{2}{7}[/tex]
--------------------
b = [tex]\frac{4}{3} *\frac{156}{7} =\frac{208}{7} = 29 \frac{5}{7}[/tex]
--------------------------------------
Odp. 22 [tex]\frac{2}{7}[/tex] cm, [tex]29 \frac{5}{7}[/tex] cm , 28 cm
===========================
Szczegółowe wyjaśnienie: