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a) Lm r nkoa!
b) \(\left(0,25x\right):3=\frac{5}{6}:0,125\)
\(=\left(0,25x\right):3=\frac{20}{3}\)
\(\Rightarrow0,25x=\frac{20}{3}\cdot3=20\)
\(\Rightarrow x=20:0,25=80\)
\(\Rightarrow x=80\)
c) \(0,01:2,5=\left(0,75x\right):0,75\)
\(=\frac{1}{250}=\left(0,75x\right):0,75\)
\(\Rightarrow0,75x=\frac{1}{250}\cdot0,75=\frac{3}{1000}\)
\(\Rightarrow x=\frac{3}{1000}:0,75=\frac{1}{250}\)
\(\Rightarrow x=\frac{1}{250}\)
d) \(1\frac{1}{3}:0,8=\frac{2}{3}:\left(0,1x\right)\)
\(=\frac{5}{3}=\frac{2}{3}:\left(0,1x\right)\)
\(\Rightarrow0,1x=\frac{2}{3}:\frac{5}{3}=\frac{2}{5}\)
\(\Rightarrow x=\frac{2}{5}:0,1=4\)
\(\Rightarrow4\)
a) 2(x-1)+3(x-3)=-2 b) x-1/3=x-2/2
2x-2+3x-9=-2 2 (x-1)=3(x-2)
(2x+3x)+(-2-9)=-2 2x-2=3x-6
5x+(-11)=-2 2x-3x=-6+2
5x=-2+11 -1x=-4
5x=9 x=4
x=1,8
Nhớ nha!
\(=\frac{1}{2}x^2y.\left(-\frac{1}{8}x^9y^3\right).4x^4\)
\(=\frac{-1}{16}x^{11}y^4.4x^4\)
\(=\frac{-1}{4}x^{15}y^4\)
\(\Rightarrow\left(x-\frac{1}{2}\right)^3=\left(\frac{1}{3}\right)^3\Rightarrow x-\frac{1}{2}=\frac{1}{3}\Rightarrow x=\frac{5}{6}\)
(x-1/2)^3=1/27
(X-1/2)^3=(1/3)^3
X-1/2=1/3
X =1/3+1/2
X =2/6+3/6
X =5/6