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해법
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the sum of three consecutive even integers is 78 . what is value of the smallest integer of three integers?5 The sum of two numbers is 30 and their 차이 is 12 .Write two equations and find the numbersThe radius of a 원형 is 20 in. Find its area in terms of pi.a father is 4 times as old as his son. in 20 years the father will be twice as old as his son how old is the father nowThe product of two less than a number and seven is thirteen.