Toán Lớp 3: $Tìm$ $x$ $x$ $+$ $123$ $.$ $5$ $=$ $1024$ $x$ $.$ $2$ $+$ $1205$ $=$ $3247$ -

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Toán Lớp 3: $Tìm$ $x$ $x$ $+$ $123$ $.$ $5$ $=$ $1024$ $x$ $.$ $2$ $+$ $1205$ $=$ $3247$