How to solve 3 question

How to solve 3 question Simplify : 24-20+5 x 2 3. 5. 7. 21-12+4-3 x 30- 16-{9-24 + (8 +6 x

=21-12?4-3?(-7)
=21-3-(-7)
=21-3+7
=21+7-3
=28-3
=25
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25 by dmas
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I am not getting it but i know directly: 3. Answer 30?8?(2?3?4)=26
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The answer is 26
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Please find this answer

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this is the answer with working

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Please find this answer

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Which of the following pairs are co-prime
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Dear student,

Plz find this answer

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