`a////b`
\(\widehat{E}=180^o-70^o=110^o\) ( kề bù )
\(\Rightarrow\widehat{A}=\widehat{E}=110^o\) ( đồng vị )
\(\Rightarrow\widehat{x}=180^o-110^o-30^o=40^o\) ( kề bù )
\(\widehat{y}=180^o-\widehat{x}=180^o-40^o=140^o\) ( trong cùng phía )
tim x,y thuoc z biet x/5=y/3=z/4 và x-z=7
tim x,y thuộc z biết x/3=y/4=z/5 và 2z+3y+5z=86
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
1,tim ba so x,y,z.bt rang:
x/2=y/3,y/4=z/5(dau / la phan)
2,tim 2 so x,ybt:x:2=y:(-5) va x-y=7
nhanh thi tick
tim x va y biet x-y=x va x+y=y
Tim x,y la so nguyen
a) 2x-3y+5= xy
b) x mu 2 +2xy+2x+4y
B2 Tim x,y la so nguyen to
x mu 2 -2y mu 2 =1
B3 Tim so tu nhienx,y
7 .(x-2004) mu 2 = 23- y mu 2
Tim x, y biet: x+y=x:y=3(x-y)
Tim x, y biet: x+y=x:y=3(x-y)
tim xy biet x+y=x/y=3*(x-y)
Tim x biết: x+y=/x/+/y/
1.Tim cac cap so nguyen x,y sao cho x+y=2xy
2.Tim GTNN A = x2+3(x-1)2
