giúp mik nào mngg~~ cần siuu gấp

Question

giúp mik nào mngg~~ cần siuu gấp
giup-mik-nao-mngg-can-siuu-gap

in progress 0
RuslanHeatt 5 years 2021-05-21T19:48:38+00:00 2 Answers 26 views 0

Answers ( )

  1. mocmien2
    0
    2021-05-21T19:50:25+00:00
    Reply

    `a)x+30% x=-1,31`

    `x(30%+1)=-1,31`

    `x(3/10+1)=-1,31`

    `x.13/10=-1,31`

    `(13x)/10=(-131)/100`

    `(130x)/100=(-131)/100`

    `130x=-131`

    `x=-131/130`

    `b)(x-1/2):1/3+5/7=9 5/7`

    `(x-1/2):1/3+(5/7-5/7)=9 5/7-5/7`

    `(x-1/2):1/3=9`

    `x-1/2=9.1/3`

    `x-1/2=3`

    `x=3+1/2`

    `x=3 1/2`

    `c)“1/2x-3/4=14/9*3/7`

    `x/2-3/4=14/9*3/7`

    `x/2-3/4=(2×1)/(3.1)`

    `x/2-3/4=2/3`

    `x/2=17/12`

    `x=(2.17)/12`

    `x=(2.17)/(2.6)`

    `x=17/6`

    `d)“(-5)/6-x=7/12+(-1)/3`

    `(-5-6x)/6=7/12+(-1)/3`

    `(-5-6x)/6=7/12+(-4)/12`

    `(-5-6x)/6=3/12`

    `(2(-5-6x))/12=3/12`

    `2(-5-6x)=3`

    `-5-6x=3/2`

    `6x=-5-3/2`

    `6x=(-13)/2`

    `x=(-13)/12`

    `e)(x+3)/-15=1/3`

    `x+3=(-15.1)/3`

    `x+3=-5`

    `x=-5-3`

    `x=-8`

    `f)“(4,5-2x)(-1 4/7)=11/14`

    `(9/2-2x)(-3/7)=11/14`

    `9/2-2x=11/14:(-3)/7`

    `9/2-2x=(-11)/6`

    `9/2-(4x)/2=(-11)/6`

    `(9-4x)/2=(-11)/6`

    `(3(9-4x))/6=(-11)/6`

    `3(9-4x)=-11`

    `9-4x=3+11`

    `9-4x=14`

    `4x=9-14`

    `4x=-5`

    `x=(-5)/4`

  2. thienthi
    0
    2021-05-21T19:50:27+00:00
    Reply

    Của bn đây nhé
    giup-mik-nao-mngg-can-siuu-gap

Leave an answer

Browse

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