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Verified answer
5x + 2y + 56 = 1805x + 2y = 124 ... (1)
12x + 108 = 180
12x = 72
x = 6
⇒Substitusi x = 6 ke (1)
5(6) + 2y = 124
30 + 2y = 124
2y = 94
y = 47
Dalam segitiga, jumlah sudutnya adalah 180°
12x + 56 + 4z = 180
12(6) + 56 + 4z = 180
72 + 56 + 4z = 180
4z = 52
z = 13
Maka,
nilai x + y + z
= 6 + 47 + 13
= 66
Jawaban A
Verified answer
12x° + 108° = 180°12x° = 180° - 108°
12x° = 72°
x = 72°/12
x = 6°
12x° + 4z° + 56° = 180°
72° + 4z° + 56° = 180°
128° + 4z° = 180°
4z° = 180° - 128°
4z° = 52°
z = 52°/4
z = 13°
56° + 5x° + 2y° = 180°
56° + 5(6°) + 2y° = 180°
56° + 30° + 2y° = 180°
86° + 2y° = 180°
2y° = 180° - 86°
2y° = 94°
y = 94°/2
y = 47°
x° + y° + z° = 6° + 47° + 13° = 66° (A)