nilai x adalah . . .
Penjelasan dengan langkah-langkah:
4x + 15° + 8x + 45° = 180°
(4 + 8)x + 60° = 180°
12x = 180° – 60°
12x = 120°
x = 120°
12
x = 10°
( 4x + 15° ) + ( 8x + 45° ) = 180°
4x + 8x + 15° + 45° = 180°
12x + 60° = 180°
12x = 180° - 60°
12x = 120°
x = 120/12
x = 10°
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