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4 February, 21:57

Three times a number plus three times a second number is fifteen. Four times the first plus twice the second number is fourteen. Find the numbers.

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  1. 5 February, 00:18
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    x = 2 | y = 3. (2,3)

    Step-by-step explanation:

    2 (3x + 3y = 15)

    6x + 6y = 30

    3 (4x + 2y = 14)

    12x + 6y = 42

    - 6x. - 6y. - 30

    6x = 12

    : 6. : 6

    x = 2

    3x + 3y = 15

    3 (2) + 3y = 15

    6 + 3y = 15

    -6. - 6

    3y = 9

    :3. : 3

    y = 3
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