Odpowiedź:
a) α + 4α + 80° = 180°
5α + 80° = 180° ║-80°
5α = 100° ║: 5
α = 20°
b) α + 3α - 8 = 12
4α - 8 = 12 ║+8
4α = 20 ║:4
α = 5
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Odpowiedź:
a) α + 4α + 80° = 180°
5α + 80° = 180° ║-80°
5α = 100° ║: 5
α = 20°
b) α + 3α - 8 = 12
4α - 8 = 12 ║+8
4α = 20 ║:4
α = 5