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14 January, 21:56

What is the sum of two numbers is 30. The sum of the greater number and three times lesser number is 53

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  1. 15 January, 00:55
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    X+y=30 ... 1

    x+3y=53 ... 2

    from equ 1

    x=30-y ... 3

    sub in equ 2

    30-y+3y=53

    30+2y=53

    2y=53-30

    2y=23

    y=23/2 = 11.5

    sub in equ 3

    x=30-11.5

    x=18.5
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