1,8 (3) . X-3=-1/2
\(\frac{27}{5}\) \(\times x=-\frac{1}{2}+3\)
\(\frac{27}{5}\times x=\frac{-1+6}{2}\)
\(\frac{27}{5}\times x=\frac{5}{2}\)
\(x=\frac{5}{2}\div\frac{27}{5}\)
\(x=\frac{5}{2}\times\frac{5}{27}\)
\(x=\frac{25}{54}\)
Vậy x = \(\frac{25}{54}\)
NHỚ TICK NHA 
0,(37) ; 0,(8) ; 3,(5) ; -17,(23)
0,11(7) ; -2,15(16) ; 1,8(2)
a,|\(\dfrac{x}{2}-\dfrac{1}{3}\)| = \(\dfrac{3}{2}\)
b, \(\dfrac{3}{2}-\dfrac{1}{2}\) ( 2x-1)=\(\dfrac{3}{4}\)
c, |x-1|+2x=2
\(\dfrac{2}{3}x-1\dfrac{2}{5}=\dfrac{1}{2}x+0,8\left(3\right)\)
Bài 1
a) 0,(3) + 0,(67)
b) 0,(15) . 11
c) 4/9 +1,2 (31)-0,(13)
d) 2 1/2 - 3,4 (12)-4/3 +1/3(1/2+0,5- 3 1/2)
Bài 2
a) 0,(37).x=1
b) 0,(26).x=1,2(31)
Mấy ah chị giúp em mấy câu này với ạ . Em cần gấp ạ
1.Tính
a)0.(3)+3\(\dfrac{1}{3}\)+0,4(2) b)\(\dfrac{4}{9}\)+1,2(31)-0,(13)
2.Tìm x, biết
a)0,(37)x=1 b)0,(26)x=1,2(31)
19, \(\sqrt{19-x}=19\)
21,\(\sqrt{x-1}=\dfrac{1}{3}\)
24,\(\sqrt{2x+\dfrac{5}{4}}=\dfrac{3}{2}\)
25,\(\sqrt{\dfrac{x}{3}-\dfrac{7}{6}}=\dfrac{1}{6}\)
Tìm x biết:
(1/5-3/2*x)^2=9/4
Bằng 2 Trường hợp
1. tìm x biết
a) (\(3\frac{1}{2}\)-2x).\(1\frac{1}{3}\)=\(7\frac{1}{3}\)
b) \(\frac{4}{5}+\frac{1}{5}:x=\frac{1}{6}\)
c) \(\left(\frac{3x}{7}-1\right):-4=\frac{-1}{28}\)
Tìm tham số m biết
\(P\left(1\right)=Q\left(0\right)\)
\(P\left(x\right)=x^2+2mx+m^2\)
\(Q\left(x\right)=x^2+\left(2m^3+1\right)x+m^2\)