Lời Giải
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a number increased by 9Andy is 3/4 as old as Mitchell. Four years ago, Andy was 2/3 as old as Mitchell. How old is each?Isaac opened a savings account and deposited 500.00. The account earns 1% interest, compounded annually. If he wants to use the money to buy a new bicycle in 3 years, how much will he be able to spend on the bike?6 is 10 less than twice a numberthe sum of 2 numbers is 6. the sum of their squares is 28. find the numbers