Odpowiedź:
Zadanie 2:
a)
[tex]\alpha +3\alpha +100 = 180\\4\alpha + 100 = 180\\4\alpha = 180 - 100\\4\alpha = 80\\\alpha = 20[/tex]
b)
[tex]\alpha +2\alpha -4 = 11\\3\alpha = 11 + 4\\3\alpha = 15\\\alpha = 5[/tex]
Zadanie 3:
[tex]x - 10\frac{4}{5} = 2\frac{1}{3} \\x = 2\frac{1}{3} + 10\frac{4}{5} \\x = \frac{7}{3} + \frac{54}{5} \\x = \frac{35}{15} +\frac{162}{15} \\x = \frac{197}{15} \\x = 13\frac{2}{15}[/tex]
