A reasonable estimate could be turning 2/5 into 2/4 (1/2) then subtracting it to give you 3 3/4 - 2/4 = 3 1/4.
To prove this estimate is reasonable, the actual answer to the problem is 3 7/20, which is pretty close to 3 1/4! (Could be written as 3 5/20)
The angles are supplementary so they add up to 180 degrees. The equation would be
x + 3x + 54 = 180
4x = 180-54
4x = 126
x = 31.5 degrees
1st angle is 31.5 degrees
2nd angle is 3x+54 = 148.5 degrees.
To check 148.5+31.5 = 180
Answer: 30 for addition and 2376 for multipaction
Step-by-step explanation: Depending on how what algebraic expression.