\(\frac{x}{6}+\frac{7}{3.2^2}=\frac{17}{18}-\frac{1}{3^2}\)
\(\frac{x}{6}+\frac{7}{12}=\frac{5}{6}\)
\(\frac{x}{6}=\frac{5}{6}-\frac{7}{12}\)
\(\frac{x}{6}=\frac{1}{4}\)
\(x=\frac{1}{4}.6\)
\(x=\frac{3}{2}\)
\(\frac{x}{6}+\frac{7}{3.2^2}=\frac{17}{18}-\frac{1}{3^2}\)
\(\frac{x}{6}+\frac{7}{12}=\frac{5}{6}\)
\(\frac{x}{6}=\frac{5}{6}-\frac{7}{12}\)
\(\frac{x}{6}=\frac{1}{4}\)
\(x=\frac{1}{4}.6\)
\(x=\frac{3}{2}\)
Tìm x biết : \(\frac{\frac{2}{3}+\frac{1}{3}\left(1,2-x\right):\frac{4}{7}}{\left(6\frac{5}{9}-3\frac{1}{4}\right).2\frac{2}{17}}=\frac{1}{4}\)
tìm x thuộc Z biết :
\(\frac{2}{3}-\left(\frac{1}{2}+\frac{3}{4}-\frac{1}{3}\right)\le\frac{x}{18}\le\frac{7}{3}\cdot\left(\frac{1}{2}-\frac{1}{6}\right)\)
Tìm x,biết
a)\(|x+\frac{1}{3}|=0\)
b)\(|x+\frac{3}{4}=\frac{1}{2}|\)
c)\(|\frac{5}{18}-x|-\frac{7}{24}=0\)
d)\(\frac{2}{5}-|\frac{1}{2}-x|=6\)
e)\(|\frac{3}{8}-x|+\frac{5}{6}=\frac{7}{4}\)
Bài 1:tìm x,biết
a) \(\frac{x}{7}\)=\(\frac{18}{14}\)b) 6:x=\(1\frac{3}{4}\):5 c) 5,7:0,35(-x):0,45
Bài 2:tìm các số x,y,z biết \(\frac{x}{2}\)=\(\frac{y}{4}\)=\(\frac{z}{6}\)và x-y+z=8
Giúp Mình nhé! Cần Gấp♥
Tính nhanh
F = \(5\frac{6}{4453}x\frac{1}{1997}-\frac{2}{1997}x2\frac{3}{4453}\)
M = \(\frac{1}{4587}x7\frac{1}{3897}-3\frac{4586}{4587}x\frac{2}{3897}-\frac{7}{4587}-\frac{3}{4587x3897}\)
x là dấu nhân
\(Q=\left(\frac{2}{5}-1,008\right):\frac{4}{7}:\left[\left(3\frac{1}{4}-6\frac{5}{9}\right)\cdot2\frac{2}{17}\right]\)
Tìm x, biết:
a) 60%x + 0,4x + x :3 =2
b)1-\(\left(5\frac{3}{8}+x-7\frac{5}{24}\right):\left(-16\frac{2}{3}\right)\)
c)\(3\frac{1}{4}x-\frac{7}{6}x=\frac{-5}{12}+1\frac{2}{3}\)
Bài 2: Tính:
a) A= \(\frac{-45.58-45.42}{2+4+6+...+16+18}\)
b)1-2-3+4+5-6-7+...+601-602-603+604
b) \(\frac{\left(140\frac{3}{7}-138\frac{5}{12}\right):18\frac{1}{6}}{0,002}\)
Bài 3: Cho A và B, biết:
A=\(\frac{2^{19}.27^3+15.4^9.9^4}{6^9.2^{10}+12^{10}}\) và B= \(\frac{4}{35}+\frac{4}{63}+\frac{4}{99}+\frac{4}{143}+\frac{4}{195}\)
Hãy so sánh A & B
tìm x biết
a,\(\left(152\frac{2}{4}-148\frac{3}{8}\right):0,2=x:0,3\)
b,\(\left(85\frac{7}{30}-83\frac{5}{18}\right):2\frac{2}{3}=0,01x:4\)
c,\(\frac{x-1}{x+5}=\frac{6}{7}\)
d,\(\frac{x^2}{6}=\frac{24}{25}\)
e,\(\frac{x-2}{x-1}=\frac{x+4}{x+7}\)
g\(\frac{x-3}{x+5}=\frac{5}{7}\),
1.tính giá trị của biểu thức sau(tính bằng cahs hợp lý nếu có thể )
\(A=\frac{2}{7}+\frac{3}{7}:\left(-\frac{3}{2}\right)\)
\(B=-\frac{5}{17}.\frac{31}{33}+-\frac{5}{17}\cdot\frac{2}{33}+2\frac{5}{17}\)
2. TÌM X BIẾT
A)\(\frac{3}{5}x+\frac{2}{3}=2\frac{2}{3}\)
b)\(5-\backslash3x-1\backslash=3\)
c)0,3x:3\(\frac{1}{3}=6:15\)
d)9\((x-1)^2-\frac{4}{9}:\frac{2}{9}=\frac{1}{4}\)