I am in a timed test please help! 3x + 12 = 21

Question

I am in a timed test please help!

3x + 12 = 21

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Thành Công 3 months 2021-09-02T15:11:06+00:00 2 Answers 1 views 0

Answers ( )

    0
    2021-09-02T15:12:15+00:00

    Answer:

    x = 3

    Step-by-step explanation:

    3x + 12 = 21

    – 12 -12

    ———————

    3x = 9

    divide by 3 on both sides to isolate

    x = 3

    0
    2021-09-02T15:12:53+00:00

    Answer:

    x=3.

    Step-by-step explanation:

    3x+12=21.

    3x=21-12.

    3x=9.

    x=3.

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