1. The sum of twice a number and 4 times another number is 4. The difference of the numbers is 5. Find the numbers.

Question

1. The sum of twice a number and 4 times another number is 4. The difference of the
numbers is 5. Find the numbers.

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Thanh Thu 6 months 2021-07-30T15:36:55+00:00 1 Answers 8 views 0

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    2021-07-30T15:38:24+00:00

    9514 1404 393

    Answer:

      4, -1

    Step-by-step explanation:

    We can let x and y represent the two numbers. The first relation is …

      2x + 4y = 4

    The second relation is …

      x – y = 5

    Subtracting the second relation from half the first gives …

      1/2(2x +4y) -(x -y) = 1/2(4) -(5)

      3y = -3

      y = -1

    From the second relation, …

      x = 5 +y = 5 -1 = 4

    The two numbers are 4 and -1.

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