Question

Hitunglah nilai y (segitiga)
sudut C 2y, sudut B 3y, sudut luar A 7y-46

Answer 1

C + B = luar A
2y + 3y = 7y - 46
5y - 7y = - 48
- 2y = - 48
y = 24

Answer 2

Jumlah sudut bangun segitiga = 180`

penyelesaian:
2y + 3y + 7y - 46 = 180
<=>2y + 3y + 7y = 180 + 46
<=======>12y = 226
<=========>y = 226/12
<=========>y = 18,83

mohon koreksi bila ada yg salah
:)