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Which two numbers should be interchanged in the following equation to make it correct?
$$731 \div 13 + 450 - 25 \times 43 = 142$$
If we interchange the position of 13 and 43 then we get,
731 ÷ 43 + 450 - 25 × 13
= 17 + 450 - 325
=467 - 325
=142
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