Answer:
7
Step-by-step explanation:
Remark
Exterior angles of a convex figure all add up to 360o. So the 4 angles on the exterior add up to 360o
Equation
12x + 37 + 12x - 2 + 20x - 29 + 46 = 360 Collect like terms on the left.
Solution
"x"s: 12x + 12x + 20x = 44x
numbers: 37 - 2 - 29 + 46 = 52
Combine
44x + 52 = 360 Subtract 52 from both sides
44x + 52 - 52 = 360 - 52 Do the subtraction
44x = 308 Divide by 44
44x/44 = 308/44 Do the division
x = 7 Answer
