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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: Cho a,b∈Z. Tìm số nguyên x, biết: a)a+x=b; b)a−x=b.

Toán Lớp 7: Cho a,b∈Z. Tìm số nguyên x, biết:
a)a+x=b; b)a−x=b.

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222-9+11+12:2*14+14 = ? ( )