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The perimeter of a rectangle is 58 feet. If the length is 10 feet, find the width. Without 대체, solve the formula for the unknown variable in terms of the known variables.the sum of three consecutive integers is 51.find the value of the greatest of the threeA boy is 6 years older than his sister. In three years, he will be twice her age. What are their present ages?The sum of two numbers is 50. The first number is 43 less than twice the second number. write and solve a system of equations to find the two numbers.Robin's number is eight more than Luaren's number. The sum of their numbers is 72. Find their numbers