60%× x +0,4 × x +x ÷3=2
Tìm x nhé
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\(\Leftrightarrow a\cdot\dfrac{13}{15}=\dfrac{28}{13}:2=\dfrac{14}{13}\)
=>\(a=\dfrac{14}{13}:\dfrac{13}{15}=\dfrac{210}{169}\)
60%.\(x\) + 0,4.\(x\) + \(x\): 3 = 4
0,6\(x\) + 0,4\(x\) + \(\dfrac{1}{3}\)\(x\) = 4
(0,6 + 0,4 + \(\dfrac{1}{3}\)).\(x\) = 4
\(\dfrac{4}{3}\).\(x\) = 4
\(x\) = 4: \(\dfrac{4}{3}\)
\(x\) = 3
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{ x2 - [ 62 - ( 82 - 9.7)3 - 7.5]3 - 5.3 }3 = 1
{ x2 + [ 36 - (64 - 63)3 - 35]3 - 15}3 = 1
[ x2 - ( 36 - 13 - 35 ) - 15 ]3 = 1
[ x2 - ( 36 - 1 - 35 ) - 15]3 = 1
[ x2 - ( 35 - 35 ) - 15]3 = 1
[ x2 - 0 - 15]3 = 1
( x2 - 15 )3 = 1
<=> ( x2 - 15)3 = 13
=> x2 - 15 = 1
<=> x2 = 16
=> x = 4
60%.x+0,4.x+x:3=2
\(\frac{3}{5}\).x+\(\frac{2}{5}\).x+x:3=2
x.(\(\frac{3}{5}\)+\(\frac{2}{5}\))+x:3=2
x.1+x.\(\frac{1}{3}\)=2
x.(1+\(\frac{1}{3}\))=2
x.\(\frac{4}{3}\)=2
x=2:\(\frac{4}{3}\)
x=\(\frac{3}{2}\)
\(60\%x+0,4x+x:3=2\\ \Leftrightarrow\left(60\%+0,4+\dfrac{1}{3}\right)x=2\\ \Rightarrow\dfrac{4}{3}x=2\\ \Rightarrow x=\dfrac{3}{2}\)
\(60\%x+0,4x+x:3=2\)
\(x.\left(60\%+0,4+\dfrac{1}{3}\right)=2\)
\(x.\dfrac{4}{3}=2\)
\(x=2:\dfrac{4}{3}\)
\(x=\dfrac{3}{2}\)
\(x^3+3x^2+x+a=x^2\left(x-2\right)+5x\left(x-2\right)+11\left(x-2\right)+22+a=\left(x-2\right)\left(x^2+5x+11\right)+22+a⋮\left(x-2\right)\)
\(\Rightarrow22+a=0\Rightarrow a=-22\)
\(60\%\cdot x+0,4\cdot x+x:3=2\)
\(x\cdot\left(60\%+0,4+\frac{1}{3}\right)=2\)
\(x\cdot\frac{4}{3}=2\)
\(x=2:\frac{4}{3}=\frac{3}{2}\)