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    Question

    What will come in the place of the question mark (?) in

    the following equation if тАШ+тАЩ and тАШ-тАЩ are interchanged and тАШxтАЩ and тАШ├╖тАЩ are interchanged? 163 ├╖ 3 + 147 ├Ч 7 тАУ 1 =?
    A 459 Correct Answer Incorrect Answer
    B 469 Correct Answer Incorrect Answer
    C 479 Correct Answer Incorrect Answer
    D 489 Correct Answer Incorrect Answer

    Solution

    163 ├╖ 3 + 147 ├Ч 7 тАУ 1 =? 163 x 3 тАУ 147 ├╖ 7 + 1 163 x 3 тАУ 21 + 1 489 тАУ 21 + 1 468 + 1 = 469

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