Hi. i need these exercises pls (+2)+(+7)=.. (-3)+(-4)=.. (+7)+(-3)=.. (-2)+(+9)=.. (-3)+(+3)=..

Question

Hi. i need these exercises pls
(+2)+(+7)=..
(-3)+(-4)=..
(+7)+(-3)=..
(-2)+(+9)=..
(-3)+(+3)=..

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RI SƠ 6 months 2021-07-27T03:25:45+00:00 1 Answers 2 views 0

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    2021-07-27T03:27:34+00:00

    1=9
    2=-7
    3=4
    4=7
    5=0

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