\(...\Rightarrow x+x+\dfrac{x}{43}+\dfrac{x}{8}=14+148+\dfrac{10}{30}+\dfrac{5}{95}\)

\(\Rightarrow\left(1+1+\dfrac{1}{43}+\dfrac{1}{8}\right)x=162+\dfrac{1}{3}+\dfrac{1}{19}\)

\(\Rightarrow\left(\dfrac{2.43.8}{43.8}+\dfrac{1.8}{43.8}+\dfrac{1.43}{43.8}\right)x=\dfrac{162.3.19}{3.19}+\dfrac{1.19}{3.19}+\dfrac{1.3}{19.3}\)

\(\Rightarrow\left(\dfrac{688}{344}+\dfrac{8}{344}+\dfrac{43}{344}\right)x=\dfrac{9234}{57}+\dfrac{19}{57}+\dfrac{3}{57}\)

\(\Rightarrow\dfrac{739}{344}x=\dfrac{9256}{57}\)

\(\Rightarrow x=\dfrac{9256}{57}:\dfrac{739}{344}=\dfrac{9256}{57}.\dfrac{344}{739}=\dfrac{\text{3184064}}{\text{42123}}\)

\(\dfrac{x}{3}=\dfrac{y}{6}=\dfrac{2x^2}{18}=\dfrac{y^2}{36}=\dfrac{2x^2-y^2}{18-36}=\dfrac{-8}{-18}=\dfrac{4}{9}\)

\(\Rightarrow\left\{{}\begin{matrix}x=\dfrac{4.3}{9}=\dfrac{4}{3}\\y=\dfrac{4.6}{9}=\dfrac{8}{3}\end{matrix}\right.\)

\(\Rightarrow x+\frac{1}{2}+x+\frac{1}{3}+x+\frac{1}{4}+x+\frac{1}{5}-x+\frac{1}{6}=0\)  

\(\Rightarrow3x+\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+\frac{1}{6}\)

k cho minh

\(x+\frac{1}{2}+x+\frac{1}{3}+x+\frac{1}{4}+x+\frac{1}{5}=x+\frac{1}{6}\)

\(\Leftrightarrow x+\frac{1}{2}+x+\frac{1}{3}+x+\frac{1}{4}+x+\frac{1}{5}-x-\frac{1}{6}=0\)

\(\Leftrightarrow3x+\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+\frac{1}{5}-\frac{1}{6}=0\)

Tính ra nhé !

\(x+\frac{1}{2}+x+\frac{1}{3}+x+\frac{1}{4}+x+\frac{1}{5}=x+\frac{1}{6}\)

\(\left(x+x+x+x\right)+\left(\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+\frac{1}{5}\right)=x+\frac{1}{6}\)

\(\Rightarrow4x+\frac{77}{60}=x+\frac{1}{6}\)

\(\Rightarrow3x=\frac{1}{6}-\frac{77}{60}\)

\(\Rightarrow3x=-\frac{67}{60}\)

\(\Rightarrow x=-\frac{67}{60}\div3=\frac{-67}{60.3}=-\frac{67}{180}\)

Vậy x = .........

x+1/2*4/5+x+x+6/10=148

x=49

số số hạng: ( 2500 - 2 ) : 2 +1  = 1250 số

tổng: ( 2500 +2  ) . 1250 : 2 = 1563750

Vì: 1250 . 1251 = 1563750

=> x = 1250 

C=(2x-1)(x-1)(2x^2-3x-1)+2017

=(2x^2-3x+1)(2x^2-3x-1)+2017

=(2x^2-3x)^2-1+2017

=(2x^2-3x)^2+2016>=2016

Dấu = xảy ra khi 2x^2-3x=0

=>x=0 hoặc x=3/2

D=(x-1)(x-6)(x-3)(x-4)+10

=(x^2-7x+6)(x^2-7x+12)+10

=(x^2-7x)^2+18*(x^2-7x)+72+10

=(x^2-7x+9)^2+1>=1

Dấu = xảy ra khi x^2-7x+9=0

=>\(x=\dfrac{7\pm\sqrt{13}}{2}\)

\(\dfrac{x}{6}=\dfrac{7}{4}\Rightarrow x=\dfrac{7.6}{4}=\dfrac{21}{2}\)

ta có :

\(12\times x=42:\frac{1}{10}\)

ha y \(12\times x=42\times10=420\) nên : \(x=420:12=35\)

Vậy x = 35

x+4=8x-10

<=> x+4-8x+10=0

<=> -7x+14=0

<=> -7x=-14

<=> x=2

Vậy x=2

x + 4 = 8x - 10

4 + 10 = 8x - x

14        = 7x

x           =  14 : 7

x           = 2

Vậy x = 2

# HOK TỐT #

MNG GIẢI GIÚP MIK VS Ạ,MƠN MNG NHIỀU LMK,