Bài 7: Tỉ lệ thức
Các câu hỏi tương tự
(2,5 - 3x) : \(1\dfrac{2}{3}=\left(\dfrac{8}{5}+2x\right):\left(-\dfrac{8}{17}\right)\)
tìm x ∈ Q biết : \(\dfrac{3\left(x+1\right)}{2}\)=\(\dfrac{8}{27\left(x-1\right)}\)
Tìm \(x\) trong các tỉ lệ thức sau :
a) \(3,8:\left(2x\right)=\dfrac{1}{4}:2\dfrac{2}{3}\)
b) \(\left(0,25x\right):3=\dfrac{5}{6}:0,125\)
c) \(0,01:2,5=\left(0,75x\right):0,75\)
d) \(1\dfrac{1}{3}:0,8=\dfrac{2}{3}:\left(0,1x\right)\)
Tìm x biết :
a) frac{-5}{7}-(frac{1}{2}-x)frac{-11}{4}
b)(2x-1)^2-520
c)left(frac{3}{4}x+3right)-left(frac{2}{3}x-4right)-left(frac{1}{6}x+1right)left(frac{1}{3}x+4right)-left(frac{1}{3}x-3right)
d)frac{x-6}{4}frac{4}{x-6}
e)frac{2x-1}{3}frac{-27}{1-2x}
f)left(x-1right)^{x+2}left(x-1right)^2
Đọc tiếp
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)^2-520
c)left(frac{3}{4}x+3right)-left(frac{2}{3}x-4right)-left(frac{1}{6}x+1right)left(frac{1}{3}x+4right)-left(frac{1}{3}x-3right)
d)frac{x-6}{4}frac{4}{x-6}
e)frac{2x-1}{3}frac{-27}{1-2x}
f)left(x-1right)^{x+2}left(x-1right)^2
Đọc tiếp
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 giá trị nhỏ nhất
A= \(\left(2x+\dfrac{1}{3}\right)^4-1\)
b, Tìm giá trị lớn nhất
B=\(-\left(\dfrac{4}{9}x-\dfrac{2}{15}\right)^6+3\)
tìm x,y thuộc Z biết:
a, \(\left(x+4\right)\left(y+3\right)=3\)
b,\(\left(x+2\right)\left(y-3\right)=-3\)
c,\(\dfrac{x+1}{2}=\dfrac{1}{y}\)
d, \(\dfrac{x-7}{-1}=\dfrac{13}{2-y}\)
1 .Tìm x , y , z biết rằng :
\(\dfrac{2x}{3}=\dfrac{3y}{4}=\dfrac{4z}{5}\) và x + y + z = 49
2.Thực hịên phép tính :
\(2^3+3\times\left(\dfrac{1}{2}\right)^2-\dfrac{1}{2^2}+\text{[}\left(-2\right)^2:\dfrac{1}{2}\times8\)
Giúp mik vs , cần gấp lắm .
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,\(1,5.\left(\frac{3}{2}-x\right)^3=-\frac{3}{16}\)