a) {* - stopień, a - alfa}
180* = 105* + 3a |-105*
3a = 75* |/3
a = 25*
b)
8 = 3a - 7 |+7
15 = 3a |/3
a = 5
c) {* - stopień, a - alfa}
180* = 30* + 3a |-30*
150* = 3a |/3
a = 50*
d)
19 = 4a - 5 |+5
24 = 4a |/4
a = 8
