What two two digit numbers that when added together equal 30 and when subtracted equals 4 or -4? Please respond quickly and with work and I

Question

What two two digit numbers that when added together equal 30 and when subtracted equals 4 or -4? Please respond quickly and with work and I will mark best answer as the brainliest answer!

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Raelynn 1 week 2021-09-13T15:33:32+00:00 1 Answer 0

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    2021-09-13T15:35:31+00:00

    Answer:

    The two digit numbers are 13 and 17.

    Step-by-step explanation:

    Firstly, you have to form a simultaneous equation. The information is when 2 number are added equals to 30 and when substracted is equals to 4 or 4. Let variable to represents the number :

    Let x be 1st number,

    Let y be 2nd number,

    x + y = 30 -  -  -  - (1)

    x - y = 4 -  -  -  - (2)

    Then you have to solve these simultaneous equation :

    (1) - (2)

    x - x + y - ( - y) = 30 - 4

    y + y = 26

    2y = 26

    y = 13

    Substitute y = 13 into (2),

    x - 13 = 4

    x - 13 + 13 = 4 + 13

    x = 17

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45:7+7-4:2-5:5*4+35:2 =? ( )