if A, B, C, and D are whole numbers such that A+B= 8, B+C= 1, B+D= 13, and C+D= 14, find the values of a,b,c,d. Answer: A = 8, B = 0, C = 1, D = 13 Step-by-step explanation: Let the following: (Eq. 1) A + B = 8 (Eq. 2) B + C = 1 (Eq. 3) B + D = 13 (Eq. 4) C + D = 14 Now, (2) + (3) = 2B + C + D = 14 Given (4), 2B = 0 -> B = 0 Solving for (2), 0 + C = 1 -> C = 1 Solving for (4), 1 + D = 14 -> D = 13 Solving for (1), A + 0 = 8 -> A = 8 Hope this helps! ~~DeanGD20