If 3a + 1 – a = 9 then what does 5a + 2 = ?

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If 3a + 1 – a = 9 then what does 5a + 2 = ?

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Delwyn 4 months 2021-07-26T02:21:37+00:00 1 Answers 5 views 0

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    2021-07-26T02:23:13+00:00

    Answer:

    3a + 1 - a = 9 \\ 2a = 8 \\ a = 4 \\ 5a + 2 =  \\ 5(4) + 2 = 22

    first find the value of a, which is 4

    then substitute a with 4

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