Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: tìm x biết a.5/2-x+4/5=2/3-(-4/7) b. 9/5=-0,15-x c.-4/7-x=3/5-2x d.(3/8-1/5)+(5/8-x)-1/5 giúp em với .em cảm ơn nhiều

Toán Lớp 7: tìm x biết
a.5/2-x+4/5=2/3-(-4/7)
b. 9/5=-0,15-x
c.-4/7-x=3/5-2x
d.(3/8-1/5)+(5/8-x)-1/5
giúp em với .em cảm ơn nhiều

Comments ( 1 )

  1. a, 5/2-x+4/5=2/3-(-4/7)
    5/2+4/5-x=26/21
    33/10-x=26/21
    x=433/210
    b, 9/5=-0,15-x
    x=-0,5-9/5
    x=-23/10
    c, -4/7-x=3/5-2x
    -4/7-3/5=-2x+x
    -41/35=-x
    =>x=41/35
    d, (3/8-1/5)+(5/8-x)=1/5
    3/8-1/5+5/8-x=1/5
    -x=1/5-5/8+1/5-3/8
    -x=-3/5
    =>x=3/5

Leave a reply

222-9+11+12:2*14+14 = ? ( )