Answer:
64° and 116°
Step-by-step explanation:
Supplementary angles sum to 180°
let one angle be x then the other is 2x - 12 ( 12 less than twice the other )
Sum the 2 angles and equate to 180
x + 2x - 12 = 180
3x - 12 = 180 ( add 12 to both sides )
3x = 192 ( divide both sides by 3 )
x = 64
The 2 angles are x = 64° and 2x - 12 = (2 × 64) - 12 = 128 - 12 = 116°
