b)\(\frac{x-2}{x+1}=\frac{3}{4}\)
\(\Leftrightarrow4x\left(x-2\right)-3\left(x+1\right)=0\)
\(\Leftrightarrow4x-8-3x-3=0\)
\(\Leftrightarrow4x-3x=8+3\)
\(\Leftrightarrow x=11\)
CÒN CÂU A MK CHƯA HIỂU ĐỀ LẮM Ạ!
b) \(\frac{x-2}{x+1}=\frac{3}{4}\)
\(\Rightarrow\left(x-2\right).4=\left(x+1\right).3\)
\(\Rightarrow4x-8=3x+3\)
\(\Rightarrow4x-3x=3+8\)
\(\Rightarrow1x=11\)
\(\Rightarrow x=11:1\)
\(\Rightarrow x=11\)
Vậy \(x=11.\)
Chúc bạn học tốt!
Tìm x biết :
a) \(\frac{-5}{7}\)-\((\frac{1}{2}-x)\)=\(\frac{-11}{4}\)
b)\((2x-1)^2-5=20\)
c)\(\left(\frac{3}{4}x+3\right)-\left(\frac{2}{3}x-4\right)-\left(\frac{1}{6}x+1\right)=\left(\frac{1}{3}x+4\right)-\left(\frac{1}{3}x-3\right)\)
d)\(\frac{x-6}{4}=\frac{4}{x-6}\)
e)\(\frac{2x-1}{3}=\frac{-27}{1-2x}\)
f)\(\left(x-1\right)^{x+2}=\left(x-1\right)^2\)
Tìm x biết :
a) \(\frac{-5}{7}\)-\((\frac{1}{2}-x)\)=\(\frac{-11}{4}\)
b)\((2x-1)^2-5=20\)
c)\(\left(\frac{3}{4}x+3\right)-\left(\frac{2}{3}x-4\right)-\left(\frac{1}{6}x+1\right)=\left(\frac{1}{3}x+4\right)-\left(\frac{1}{3}x-3\right)\)
d)\(\frac{x-6}{4}=\frac{4}{x-6}\)
e)\(\frac{2x-1}{3}=\frac{-27}{1-2x}\)
f)\(\left(x-1\right)^{x+2}=\left(x-1\right)^2\)
a)tìm x,y biết:\(\frac{x}{12}=\frac{y}{3}vàx-y=36\)
b)tìm x biết:\(\frac{2}{3}+\frac{5}{3}x=\frac{5}{7}\)
\(\frac{11}{12}-\left(\frac{2}{5}+x\right)=\frac{2}{3}\)
\(\left|x-\frac{2}{5}\right|+\frac{3}{4}=\frac{11}{4}\)
\(\left(x-\frac{1}{2}\right)^3=\frac{1}{27}\)
tìm x,y,z biết
a.\(\left(\frac{1}{3}.x\right):\frac{2}{3}=4^3_8\)
b.\(1^2_3x-\frac{1}{4}=\frac{5}{6}\)
c.\(\left|x-\frac{2}{5}\right|+\frac{3}{4}=\frac{11}{4}\)
d.x:y:z=2:3:4 và x+y-2z=3
e.\(\frac{x}{4}=\frac{y}{3}=\frac{z}{9}vàx-3y+4z=62\)
tìm x,y,z biết
a)\(\frac{x}{y}=\frac{7}{3}và5x-2y=87\)
b)\(\frac{x}{19}=\frac{y}{21}và2x-y=34\)
c)\(\left(\frac{-2}{3}\right).x=\left(\frac{-2}{3}\right)^5\)
d)\(\left(\frac{-1}{3}\right)^3.x=\frac{1}{81}\)
a,\(\left(2x-1\right)=-8\)
b,\(\left(3x-2\right)^2=\frac{1}{49}\)
c,\(x^3-\frac{1}{4}.x=0\)
d,\(\frac{x^2}{6}=\frac{24}{25}\)
e,\(1,5.\left(\frac{3}{2}-x\right)^3=-\frac{3}{16}\)
tìm x
a) \(\left|x-\frac{1}{2}\right|-\sqrt{\frac{1}{9}}=\sqrt{\frac{1}{4}}\)
b)\(3^{x+2}-3^x=72\)
Tìm x, biết: a) \(\left(3x-2\right):1\frac{2}{5}=2\frac{3}{7}:2\frac{3}{5}\) b) x:0,16=9:x
1.tìm x biết
| a) x:8=7:4 | d) 2,5:7,5= x:\(\frac{7}{9}\) | h) \(2\frac{2}{3}:x=1\frac{7}{9}:0,02\) |
| b) (x+1):0,75=1,4:0,25 | e) \(\frac{x-1}{x-5}=\frac{6}{7}\) | f) \(\frac{x^2}{6}=\frac{24}{25}\) |
| c) \(\frac{x+2}{5}=\frac{1}{x-2}\) | g) \(\frac{3}{x-4}=\frac{x+4}{3}\) | i) \(\frac{x+2}{x+6}=\frac{3}{x+1}\) |
