Two less than the sum of a number and six is equal to the product of the number and three. What is the number?

Question

Two less than the sum of a number and six is equal to the product of
the number and three. What is the number?

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Verity 3 years 2021-08-24T22:17:16+00:00 1 Answers 17 views 0

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  1. Jezebel
    0
    2021-08-24T22:18:32+00:00
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    Let’s use the variable, x, to represent the unknown number.

    We can represent the words, “the sum of a number and six, as : x + 6

    The words, ” 2 less than the sum”, can be represented as: x + 6 – 2

    The words, “the product of the number and three”, can be written as: 3x

    Now create an equation using “is equal to” to join the expressions:

    x + 6 -2 = 3x

    Now combine like terms and use inverse operations to solve for x:

    x + 6 -2 = 3x

    x + 4 = 3x

    x + 4 – x = 3x – x

    4 = 2x

    4/2 = 2x/2

    2 = x

    The unknown number is 2

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