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דוגמאות פופולריות
Two trains are moving toward each other. One train moves at a speed of 50 mph, and the other train travels at 70 mph. How soon will they meet if the original distance between them was 390 miles?Find four consecutive even integers such that if the sum of the first and the third is multiplied by 3, the result is 28 less than 5 times the fourth.The radius of a circle is 9 in. Find its circumference in terms of pipi.Kelly is 8 years younger than her sister. The sum of their ages is 44 years. How:old is Kelly and how old is her sister?21.Pamela is 14 years younger than Jiri. The sum of their ages is 30. What is Jiri