Równanie 1:
[tex]\alpha + 2 \alpha + 60 \textdegree = 180 \textdegree\\3 \alpha + 60 \textdegree = 180 \textdegree \ \ \ \ \ \ \ \ \ \ \ \ \ /-60 \textdegree\\3 \alpha = 120 \textdegree \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ /:3\\\alpha = 40 \textdegree[/tex]
Równanie 2:
[tex]a + 4a-5 = 10 \\5a-5=10 \ \ \ \ \ \ \ \ \ \ \ \ / +5\\5a = 15 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ /:5\\a = 3[/tex]
