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15 May, 07:25

Complete your work in the space provided or upload a file that can display math symbols if your work requires it. Include the entire process for establishing a set of equations, the solution, and an explanation of what the solution means in terms of thevariables. Follow the process for establishing a set of equations: Choose a variable to represent one of the unknowns. Express the remaining unknowns in terms of the variable you chose in step 1. Look for a relationship between the unknowns given in the problem. Write an equation. (Look for the other relationship given in the problem.) The tens digit of a number is twice the ones digit. The sum of the digits in the number is 12. What is the number?

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  1. 15 May, 09:22
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    Let the once digit of the number is x,

    According to the question,

    The tens digit of the number = 2x

    Also, the sum of the these two digit of the number = 12

    ⇒ x + 2x = 12

    ⇒ 3x = 12

    ⇒ x = 4

    Therefore, the once digit of the number = 4

    And, the tens digit of the number = 2x = 2*4 = 8

    Thus, the number = the place value of tens digit + the place value of the once digit = 80 + 4 = 84
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