Solve using substitution. y = -2 -7x – y = -5

Question

Solve using substitution.
y = -2
-7x – y = -5

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Tài Đức 4 years 2021-08-03T20:40:26+00:00 1 Answers 14 views 0

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  1. binhan
    0
    2021-08-03T20:42:03+00:00
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    Step-by-step explanation:

    - 7x - ( - 2) = - 5 \\ - 7x + 2 = - 5 \\ - 7x = - 7 \\ x = 1 \\

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