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29 September, 04:41

How do you solve this problem using substitution or elimination?

Three times the larger of two numbers is equal to 4 times the smaller. The sum of the numbers is 21. Find the numbers.

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  1. 29 September, 04:46
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    3x=4y

    x+y=21

    x = 21-y

    3 (21-y) = 4y

    63-3y=4y

    63=7y

    y=9

    x+y=21

    x+9=21

    x=12

    answer is (12, 9)
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