Answer:
m∠A = 15°; m∠B = 89°; m∠C = 76°
Step-by-step explanation:
The sum of the three interior angles of a triangle is 180°.
       Let x = m∠A
Then 3x + 44 = m∠B
  and x + 61 = m∠C
x + 3x + 44 + x + 61 = 180
         5x + 105 = 180
              5x =  75
                x =  15
m∠A =                    15°
m∠B = 3(15) + 44 = 45 + 44 =  89°
m∠C =            15 + 61 =  76°
                   Sum = 180°