Question 770689
B + C = 11
B + D = 13
Subtract
C - D = -2
C + D = 14
Add
2C = 12
C = 6
B + C = 11
B + 6 = 11
B = 5
A + B = 8
A + 5 = 8
A = 3
B + D = 13
5 + D = 13
D = 8
A = 3, B = 5, C = 6, D = 8
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