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Mathematics, 25.03.2021 19:50 liliJ

30 + a = 40
40 + b = 30
c - 3 = 8
d - 3 = 8
plz answer.

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Answers: 3

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You know the right answer?
30 + a = 40
40 + b = 30
c - 3 = 8
d - 3 = 8
plz answer....

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