Question no. 22 please solve

Question no. 22 please solve 21. 5 kg sugar and 7 kg rice together cost 258, while 7 kg sugar and 5 kg rice together cost 246. Find the total cost of 8 kg sugar and 10 kg rice. 22. One year ago a man was four times as old as his son. After 6 years, his age exceeds son's age by 9 years. Find their present ages.

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