Bài 1: Tìm x:
a, \(\left(2-3x\right)-\left(5x+8\right)=15x\)
b, \(3\left(x-3\right)-2\left(8-x\right)=6\)
c, \(\frac{7-x}{2}-\frac{2x-3}{4}=\frac{x+2}{8}=\frac{-1}{2}\)
d, \(x^2.\left(-4x\right)+3=0\)
GIÚP MIK NHA!!!!!
Bài 1: Tìm x biết:
a, \(x.\cdot\left(\frac{1}{4}+\frac{1}{5}\right)-\left(\frac{1}{7}+\frac{1}{8}\right)=0\)
b, \(\left(5x-1\right).\left(2x-\frac{1}{3}\right)=0\)
c, \(\frac{3x+2}{5x+7}=\frac{3x-1}{5x+1}\)
d, \(\frac{x+1}{2x+1}=\frac{0,5x+2}{x+3}\)
e, \(\frac{-3}{4}-\left|\frac{4}{5}-x\right|=-1\)
Câu 1: Tìm x biết: \(\frac{x+2}{327}+\frac{x+3}{326}+\frac{x+4}{325}+\frac{x+5}{324}+\frac{x+349}{5}=0\)
Câu 2: Tìm x biết:\(\frac{x^2-24}{2001}+\frac{x^2-22}{2003}=\frac{x^2-20}{2005}+\frac{x^2-18}{2007}\)
Câu 3: Tìm x biết\(\frac{6}{x^2+2}+\frac{12}{x^2+8}=3-\frac{7}{x^2+3}\)
Câu 4: Tìm x biết: a)\(\frac{x-1}{2001}+\frac{x-2}{2010}-\frac{x-3}{2009}=\frac{x-4}{2008}\)
b)\(\frac{x+97}{125}+\frac{x-63}{35}=\frac{x-7}{21}+\frac{x-77}{49}\)
c)\(\frac{x+2}{13}+\frac{2x+45}{15}=\frac{3x+8}{37}+\frac{4x+69}{9}\)
Giúp mình nhé! Mình cần sự trợ giúp từ các bạn, mình cần phải nộp mấy bài này gấp! Cảm ơn các bạn!!!!!
tìm x biết
a) \(\frac{x-1}{x+2}=\frac{4}{5}\left(x\ne-2\right)\) b)22x+1+4x+3=264 c)\(\frac{x^2}{-8}=\frac{27}{x}\left(x\ne0\right)\) d)\(\frac{x+7}{-20}=\frac{-5}{x+7}\left(x\ne-7\right)\) e)\(\frac{x}{-8}=\frac{2}{-x^3}\left(x\ne0\right)\)
1.tìm x
a.\(\frac{-5}{8}+x=\frac{4}{9}\)
b.\(1^3_4.x+1^1_2=-\frac{4}{5}\)
c.\(\frac{1}{4}+\frac{3}{4}x=\frac{3}{4}\)
d.\(x.\left(\frac{1}{4}+\frac{1}{5}\right)-\left(\frac{1}{7}+\frac{1}{8}\right)=0\)
e.\(\frac{3}{35}-\left(\frac{3}{5}+x\right)=\frac{2}{7}\)
f.\(\frac{3}{7}+\frac{1}{7}:x=\frac{3}{14}\)
g.\(\left(5x-1\right)\left(2x-\frac{1}{3}\right)=0\)
Tìm x biết:
a) 3 : (1 - \(\frac{3}{2}\)x) = 4 : (2 - x)
b) \(\frac{-1}{7}\) . 23 - 2x : 1\(\frac{4}{3}\) = -2x-1
c) 2.3x + 3x-1 = 7(32 + 2.62)
d) 2x - \(\frac{5}{4}\) = (3 - \(\frac{1}{2}\))(x - \(\frac{1}{2}\))
e) \(\frac{1}{2}\) . 2x + 2x+2 = 28 . 25
bài 1 :
a) x2 -7x + 6 = 0 b) x2 -10x + 9 =0
c) x2 +9x + 8 = 0 d) x2 - 11x + 10 = 0
bài 2 tìm tỉ số \(\frac{x}{y}\) biết \(\frac{2x-y}{x+y}=\frac{2}{3}\)
bài 3 cho \(\frac{A}{2}=\frac{4}{3};\frac{y}{z}=\frac{3}{2};\frac{z}{x}=\frac{1}{6}\) tìm tỉ số \(\frac{A}{y}\)
bài 4 tìm x
\(\frac{x}{y^2}=2\) và \(\frac{x}{y}=16\)
bài 1 tính
\(A=\frac{a+b}{b+c}\) biết \(\frac{b}{a}=2;\frac{c}{b}=3\)
bài 2 tìm x
a) \(\frac{72-x}{7}=\frac{x-40}{9}\)
b) \(\frac{x+4}{20}=\frac{5}{x+4}\)
bài 3 tìm x,y
\(\frac{1+2y}{18}=\frac{1+4y}{24}=\frac{1+6y}{6x}\)
bài 8 tìm x,y,z
a) x:y:z=3:4:5 và 2x2+2y2-3z2=-100
b)\(\frac{x}{y+z+1}=\frac{y}{x+z+1}=\frac{z}{x+y-2}=x+y+z\)
c) \(\left|x-3\right|+\left|y+5\right|+\left|x+y+z\right|=0\)
d) \(\left|2x-5\right|+\left|2y-z\right|+\left|4z-2\right|=0\)
Tìm x, biết
a) \(\frac{3}{2}x-\frac{7}{3}=-\frac{1}{4}\)
b) \(\frac{3}{4}-\left(x+\frac{1}{2}\right)=\frac{1}{4}\)
c) \(\left|2x-1\right|-\frac{1}{2}=\frac{1}{3}\)