\(\frac{4}{11}< \frac{x}{20}< \frac{5}{11}\Rightarrow\frac{80}{220}< \frac{11.x}{220}< \frac{100}{220}\)
\(\Rightarrow80< 11.x< 100\)
\(\Rightarrow11.x\in\left\{88;99\right\}\)
\(\Rightarrow x\in\left\{8;9\right\}\)
Tim so nguyen x , biet : 1 phan 6 = x phan 18 ; x phan 8 = -1 phan 4 ; 4 phan -5 = x phan 10 ; 11 phan 5 = -22 phan x ; x phan 8 = 8 phan x ; x phan -11 = -11 phan x
tim x thuoc N , biet
x-20/11.13- 20/13.15-20/15.17...-20/53.55 =3/11
tim x sao cho 4/11<x/20<5/11
tim x biet 2.|x+2|+|4-x|=11
tim x biet : (11/12+11/12.23+11/23.24+...+11/89.100) + x = 2/3
Tim x biet 11*(x-6)=4x+11
Tim x biet (x-3) + (x-2) + (x-1) + ... + 10 + 11 = 11
tim x biet
a)20÷(2x-3)=4
b)2017-69×(11-x)=27÷23
Giai nhanh giup minh nhe!
Tim cac so nguyen x,y biet
\(\frac{x}{6}=\frac{y}{11}\)va 3x - 2y =-20
