\(=\dfrac{\left(\dfrac{2}{3}\cdot\dfrac{-3}{4}\right)^2\cdot\dfrac{2}{3}\cdot\left(-1\right)}{\left(\dfrac{2}{5}\cdot\dfrac{-5}{12}\right)^2}=\dfrac{\dfrac{1}{4}\cdot\dfrac{2}{3}\cdot\left(-1\right)}{\dfrac{1}{36}}=\dfrac{-2}{12}:\dfrac{1}{36}=-\dfrac{1}{6}\cdot36=-6\)
16/ 1/2.x+1/6.x(x-2)=3/4-2.x
19/ 5/12.x+3=1/3-7/12.x
20/ 1/2.x+5/2=7/2.x-3/4
Mọi người giúp mình với mình đang cần gấp!!!
Tìm x biết x+5/12=-2/3 b,4/5+3/4:x=1/2 c,x/2+x/3=1/4
Bài 1. Tìm \(x\).
a) -5(\(x\)2-3\(x\)+1)+\(x \)(1+5\(x\))=\(x-2\)
b) \(12x\)2\(-4x\)\((3x+5)\)\(=10x-17\)
c) \(-4x(x-5)+7x(x-4)-3x\)2\(=12\)
Bài 2. Tính ( Rút gọn).
a) \((x+5).(x-7)-7x.(x-3)\)
b) \(x.(x\)2\(-x-2)-(x-5).(x+1)\)
c) \((x-5).(x-7)-.(x+4).(x-3)\)
d) \((x-1).(x-2)-(x+5).(x+2)\)
2.x-3/3 + -3/2 = 5 - 3.x /6 - 1/3
2/3.x - 3/12 = 4/5 - (7/x -2)
a) 1/x-1 + -2/3 x (3/4 - 6/5) = 5/2-2x
b) 3 - 2/2x-3 = 2/5 + 2/9-6x - 3/2
c) x/2 - 1/x = 1/12
Thực hiện phép tính: a,(9/10 - 15/16) X (5/12 - 11/15 - 7/20) b,(-1)3 + (-2/3)2: 2 2/3 + 5/6 c,15 X (-1/5)2 + 1/5 - 2 X (-1/2)3 - 1/2 d,22 - (-5/7) + (1/3)4 X 36
Giúp mik vs mik sẽ tick cho T-T
Bài1: Tìm số hữu tỉ x bt rằng:
e) 2/3x - 3/12 =4/5 - (7/x - 2)
f) 1/x-1 + -2/3 . (3/4 - 6/5) = 5/2 - 2x
g) 3 - 2/2x - 3 = 2/5 + 2/9 - 6x - 2/3
h) x/2 - 1/2 = 1/12
Tìm x:
a) \(\dfrac{11}{12}\) - (\(\dfrac{2}{5}\) + \(\dfrac{3}{4}\)x) \(\dfrac{2}{3}\)
b) \(\dfrac{-2}{5}\) + \(\dfrac{5}{3}\) . (\(\dfrac{3}{2}\) - \(\dfrac{4}{15}\)x) = \(\dfrac{-7}{6}\)
c) \(\dfrac{1}{2}\) + \(\dfrac{3}{4}\)x = \(\dfrac{1}{4}\)
