RRB Question | A number subtracted by 40, the number decreased by 60% of that number Find the number

A number subtracted by 40, the number decreased by 60% of that number Find the number.
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consecutive number problem:
https://youtube.com/watch?v=okg0ElpSw...
consecutive number problems:
https://youtube.com/watch?v=e2hdQM6hW...
Average of consecutive Odd numbers:
https://youtube.com/watch?v=ZEV2jfrjWGQ
Average of consecutive Even numbers:
https://youtube.com/watch?v=W13hVQ-5aKU
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A number subtracted by 40 the number decreased60% of that number find the numberkanitham karkaகணிதம்_கற்க