Các câu hỏi tương tự
Tim x biet
a /x/=2 1/2
b /x+1/=3 1/3
c 2×/×-2/=0
d 1,5-3×/x+1/
e 2×/3-2x/-4,5=/-2,5/
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tim 2 so huu ti x vay biet 1,5.x+2,25.=0 va 2x+5y=11
tim x biet 2x+1/x-2=2x-3/x+6
a, Tim x biet:/x-2/+/3-2x/=2x+1
b, Tim x,y thuoc Z biet:xy+2x-y=5
c, tim x,y,z, biet :2x=3y;4y=5zva 4x-3y+5z=7
|(x+1/2).|2x-3/4||=2x-3/4 tim x biet
tim x biet |x-2|-|2x+3|-x=-2
tim x,biet: |2x-3|-X=|2-x|
Tim x,y,z biet:2(x-1)-3(2x+2)-4(2x+3)=16
a,tim x biet |x-2|+|3-2x|=2x+1
b,tim x,y thuoc Z biet xy+2x-y=5
c, tinh A=(1-1/15)(1-1/21)(1-1/28).....(1-1/210)