The sum of a number and 9 is 21. Find the number.

Question

The sum of a number and 9 is 21. Find the number.

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Thiên Di 2 months 2021-07-28T01:51:24+00:00 2 Answers 1 views 0

Answers ( )

    0
    2021-07-28T01:52:33+00:00

    Answer:

    12

    Step-by-step explanation:

    0
    2021-07-28T01:52:59+00:00

    Answer:

    12……………………..

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )