x-y =3 work out 2x – 2y work out the value of y-x

Question

x-y =3
work out 2x – 2y
work out the value of y-x

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Thu Thảo 6 months 2021-09-05T04:03:35+00:00 1 Answers 8 views 0

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    2021-09-05T04:04:44+00:00

    Answer:

    Step-by-step explanation:

    x - y = 3\\\\2x - 2y = 2 ( x- y ) = 2 \times 3 = 6\\\\(y - x) = - (x - y) = - 3

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