Tìm x:
a) \(x \times 6 = 1266\)
b) \(7 \times x = 2884\)
\(\eqalign{ a) \ x \times 6 &= 1266 \cr x &= 1266:6 \cr x & = 211 \cr} \)
\(\eqalign{ b)\ 7 \times x &= 2884 \cr x &= 2884:7 \cr x&= 412 \cr} \)
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