Toán Lớp 6: Tìm a,b ∈ Z . Tìm x ∈ Z
a. x – a = 2
b. x + b = 4
c. a – x = 21
d. 14 – x = b + 9
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Toán Lớp 6: Tìm a,b ∈ Z . Tìm x ∈ Z
a. x – a = 2
b. x + b = 4
c. a – x = 21
d. 14 – x = b + 9
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