The person went wrong on step 2
Should be
11 + (9)(3)= x
11 + 27= x
x = 38
If we assume that the figure is a triangle with a supplementary angle outside the triangle ABD, ∠F. Given that angle D is 31 and angle A is 27. Therefore, angle B is 122. Then, angle F is supplementary to angle D, meaning angle F will have a measurement of 180 - 31 = 149.
1 month?? You didn't specify any amounts or anything..
