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\(\frac{1}{3}.x+650\%x-x=-6\)
\(x.\left(\frac{1}{3}+650\%-1\right)=-6\)
\(\frac{35}{6}.x=-6\)
\(x=-6:\frac{35}{6}\)
\(x=-\frac{36}{35}\)
~ Thiên Mã ~
x - 1/9 = 8/3
=> x = 8/3 + 1/9
=> x = 25/9
1/3x + 650%x - x = -6
=> (1/3 + 13/2 - 1)x = -6
=> 35/6x = -6
=> x = -6 : 35/6
=> x = -36/35
a)5x+5x+2=650
2*5x+2=650
2(5x+1)=650
5x+1=650/2
5x+1=325
5x=325-1
5x=324
=>x \(\in\phi\)
b)3x-1+5*3x-1=162
3x-1(1+5)=162
3x-1=162/6
3x-1=27=33
=>x-1=3
x=3+1
x=4
c)(2x-1)6=(1-2x)8
(2x-1)6=(-2x-1)8=(2x-1)8=(2x-1)6*(2x-1)2
=>(2x-1)2=1
2x-1=1
2x=1+1
2x=2
x=2/2
x=1
*)2x-1=0
2x=0+1
2x=1
x=1/2
5^x + 5^ ( x + 2 ) = 650
5x + 5x . 52 = 650
5x .( 1 + 25 ) = 650
5x . 26 = 650
5x = 650 : 26
5x = 25
5x = 52
=> x = 2
Vậy x = 2
a) \(2\dfrac{3}{4}-x=\dfrac{3}{4}\)
\(\Rightarrow\dfrac{11}{4}-x=\dfrac{3}{4}\)
\(\Rightarrow x=\dfrac{11}{4}-\dfrac{3}{4}=\dfrac{8}{4}=2\)
b) \(x:\dfrac{5}{6}=-\dfrac{3}{5}\)
\(\Rightarrow x=-\dfrac{3}{5}.\dfrac{5}{6}=-\dfrac{15}{30}=-\dfrac{1}{2}\)
c) \(1\dfrac{1}{3}+\dfrac{2}{3}:x=1\)
\(\Rightarrow\dfrac{2}{3}:x=1-1\dfrac{1}{3}\)
\(\Rightarrow\dfrac{2}{3}:x=-\dfrac{1}{3}\)
\(\Rightarrow x=\dfrac{2}{3}:-\dfrac{1}{3}\)
\(\Rightarrow x=-2\)
d) \(x-\dfrac{1}{9}=\dfrac{8}{3}\)
\(\Rightarrow x=\dfrac{8}{3}+\dfrac{1}{9}\)
\(\Rightarrow x=\dfrac{25}{9}\)
e) \(\dfrac{1}{2}x+650\%x-x=-6\)
\(\Rightarrow\dfrac{1}{2}x+\dfrac{13}{2}x-x=-6\)
\(\Rightarrow x\left(\dfrac{1}{2}+\dfrac{13}{2}-1\right)-6\)
\(\Rightarrow6x=-6\)
\(\Rightarrow x=\dfrac{-6}{6}=-1\)
g) \(2\left(x-\dfrac{1}{2}\right)+3\left(-1+\dfrac{x}{3}\right)=x\left(\dfrac{2}{x}-1\right)\) \(\text{Đ}K:x\ne0\)
\(\Rightarrow2x-1-3+x=2-x\)
\(\Rightarrow3x-4=2-x\)
\(\Rightarrow3x+x=2+4\)
\(\Rightarrow4x=6\)
\(\Rightarrow x=\dfrac{6}{4}=\dfrac{3}{2}\)
Ta có:
Số số hạng của tổng là: ( 2 x X - 2) : 2 + 1 = X ( số)
(X : 2) x (2 x X + 2) = X . (X + 1)
Ta có: 650 = 25 x 26 => X =25
x(x + 1) = 650
Ta có: 25.26 = 650
=> x = 25
Cách này lấy máy tính bấm nhanh hơn:
\(\sqrt{650}\)
= \(5\sqrt{26}\)
= 25,4950...
=> x = 25
a,5x + 5x + 2 = 650
=> 5x+5x.52=650
=> 5x.(1+25)=650
=> 5x=52
=> x=2
3x - 1 + 5 . 3x - 1 = 162
3x-1.(1+5)=162
=> 3x-1=27
=> 3x-1=33
=> x-1=3
=> x=4
5 x + 5 x + 2 = 650 3x - 1 + 5 . 3x - 1 = 162
5 x( 1 + 5 2 ) = 650 3x - 1 ( 5 + 1 ) = 162
5 x = 25 3x - 1 = 27
\(\Rightarrow\)x = 2 \(\Rightarrow\)x - 1 = 3
\(\Rightarrow\)x = 4
\(\frac{1}{3}x+650\%x-x=-6\)
\(\frac{1}{3}x+\frac{13}{2}x-x=-6\)
\(x\left(\frac{1}{3}+\frac{13}{2}-1\right)=-6\)
\(x\left(\frac{2}{6}+\frac{39}{6}-\frac{6}{6}\right)=-6\)
\(x\frac{35}{6}=-6\)
\(x=-6.\frac{35}{6}\)
\(x=-35\)
\(\Rightarrow x=-35\)
\(\frac{1}{3}x+650\%\cdot x-x=\left(-6\right)\)
\(\Rightarrow\frac{1}{3}x+6,5\cdot x-x=\left(-6\right)\)
\(\Rightarrow x\left(\frac{1}{3}+6,5-1\right)=\left(-6\right)\)
\(\Rightarrow x\left(\frac{1}{3}+\frac{13}{2}-1\right)=\left(-6\right)\)
\(\Rightarrow x\left(\frac{2}{6}+\frac{39}{6}-\frac{6}{6}\right)=\left(-6\right)\)
\(\Rightarrow x\left(\frac{2+39-6}{6}\right)=\left(-6\right)\)
\(\Rightarrow x\cdot\frac{35}{6}=\left(-6\right)\)
\(\Rightarrow x=\left(-6\right):\frac{35}{6}\)
\(\Rightarrow x=-\frac{36}{35}\)