a) \(\dfrac{3,5}{15}=\dfrac{-2}{x}\)
\(\Rightarrow x=\dfrac{15.-2}{3,5}\)
\(\Rightarrow x=-8,57\)
b) \(2\left(3x-2\right)-3\left(x-2\right)-=-1\)
\(\Rightarrow6x-4-3x+6=-1\)
\(\Rightarrow6x-3x=-1+4-6\)
\(\Rightarrow3x=-3\)
\(\Rightarrow x=-\dfrac{3}{3}=-1\)
Tìm x:
a,| 4 + 2x| = -4x
b,|3x - 1|+ 2 = x
c, |x + 15 | + 1 = 3x
d,| 2x - 5| = x + 2
1 . Tìm x:
a) x.2 / -15 = -5/3
b) x-1 / -12 = -3 / x - 1
Tìm x:
a) \(\dfrac{1}{2}+\dfrac{2}{3}x=\dfrac{1}{4}\)
b) \(2\dfrac{2}{3}:x=1\dfrac{7}{9}:0,02\)
c) \(x^x-x+1=1\)
d) \(5-\left|3x-1\right|=3\)
1. Tìm x:
a) x + 2 / -15 = -5/3
1. Tìm x:
a) x + 2 / -15 = -5/3
Tìm x:a) (3x-2)x-2 -(2x+1)x+2=0
chứng minh rằng các biểu thức sau không phụ thuộc vào x:
a. \(A=\left(3x+7\right)\left(2x+3\right)-\left(3x-5\right)\left(2x+11\right)\)
b. \(B=\left(x^2-2\right)\left(x^2+x-1\right)-x\left(x^3+x^2-3x-2\right)\)
c. \(C=x\left(x^3+x^2-3x-2\right)-\left(x^2-2\right)\left(x^2+x-1\right)\)
Bài 4: tìm x:
a) \(\dfrac{4}{3}\) + (1,25 - x) = 2,25
b) \(\dfrac{17}{6}\) - (x - \(\dfrac{7}{6}\) ) = \(\dfrac{7}{4}\)
c) 4 - (2x + 1) = 3 - \(\dfrac{1}{3}\)
bài 15:
a) (\(\dfrac{-2}{3}\))9 : x = (\(\dfrac{-2}{3}\))
b) x : (\(\dfrac{4}{9}\))5 = (\(\dfrac{4}{9}\))4
c) (x + 4)3 = -125
d) (10 - 5x)3 = 64
e) (4x + 5)2 = 81
Bài 16:
a) 4 - \(1\dfrac{2}{5}\) - \(\dfrac{8}{3}\)
b) -0,6 - \(\dfrac{-4}{9}\) - \(\dfrac{16}{15}\)
c) \(-\dfrac{15}{4}\) . (\(\dfrac{-7}{15}\)) . (\(-2\dfrac{2}{5}\)
Gi ải gấp giúp mình ạ, mình rất cần gấp
Tìm x:a) -5(x-1)+13=2(8-x)-15
b) 3.5x+2+4.5x-3=19.510
c) 6.8x-1+8x+1=821+819.6
