Solve for the unknown in the equation 3(x-1)=21

Question

Solve for the unknown in the equation
3(x-1)=21

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Ngọc Diệp 2 weeks 2021-09-05T07:43:38+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-09-05T07:44:44+00:00

    Answer:

    6

    Step-by-step explanation:

    The main idea of how to solve it is to isolate the variable. Whatever you multiply, divide, add, or subtract on one side, you must do the same to the other side so that both sides are equal.

    3(x-1) = 21

    3(x-1) / 3 = 21 / 3

    x – 1 = 7

      + 1 + 1

    x = 6

    0
    2021-09-05T07:44:59+00:00

    Answer:

    x = 8

    Step-by-step explanation:

    First distribute

    then +3 to both sides

    which becomes 3x = 21

    then divide both sides by 3 to get X by itself  

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