几道数学题,求你门了!解方程:(-23 )*278 /(23 *23 *23 )130 -(-23 +35 )/(-2)

2个回答

  • (-23 )*278 /(23 *23 *23 )

    =》原式=-(278/529)

    130 -(-23 +35 )/(-2)

    =》原式=136

    16X-40=9X+16

    =》7X=56

    =》X=8

    4X=203 X+16

    =》-199X=16

    =》X=-(199/16)

    2(3-X)=-4(X+5)

    =》6-2X=-4X-20

    =》2X=-26

    =》X=-13

    3(-2X-5)2X=9

    =》-12X^2-30X=9

    =》12X^2+30X+9=0

    =》4X^2+10X+3

    12 (X-4)-3X+4)=-152

    不明白

    X-74 -5X+83 =1

    -4X=-8

    X=2