Can there be more than one answer? I think it could be add x, subtract 1, divide by 4 and/or subtract 1, add x, divide by 4
The answer is c because it’s 9+6 and then u divide it it just makes more since
22/39 since you took one piece out. Sorry if this rounds down more.
Area of box : 18*18, which is 324
area of larger triangle : 18*16/2 which is 144
area of larger triangle : 8*16/2 which is 64
add them all to get 532