są dwa rozwiązania ;)
1.
A - 4
B - 8C - 2D - 7
AB + CD = BC - D
48 + 27 = 82 - 7
75 = 75
A + B + C + D = 21
4 + 8 + 2 + 7 = 21
21 = 21
2.
A - 1
B - 9C - 7D - 4
19 + 74 = 97 - 4
93 = 93
1 + 9 + 7 + 4 = 21
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są dwa rozwiązania ;)
1.
A - 4
B - 8
C - 2
D - 7
AB + CD = BC - D
48 + 27 = 82 - 7
75 = 75
A + B + C + D = 21
4 + 8 + 2 + 7 = 21
21 = 21
2.
A - 1
B - 9
C - 7
D - 4
AB + CD = BC - D
19 + 74 = 97 - 4
93 = 93
A + B + C + D = 21
1 + 9 + 7 + 4 = 21
21 = 21