`Tìm` `x`
`|14-19x|` `=` `|7x-15|`
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\(x+3+7x-19x=38\)
\(-11x+3=38\)
\(-11x=38-3\)
\(-11x=35\)
\(x=-\frac{35}{11}\)
(x³ - 4x² - 3x² + 12x + 2x - 8 =0
x²(x - 4) - 3x(x - 4) + 2(x - 4) =0
(x - 4)(x² - 3x + 2) =0
(x - 4)(x - 1)(x - 2) =0
=>X-4=0 hoặc x-1=0 hoặc x-2=0
(tự giải tiếp nhá)
`( 19x + 2*5^2 ) : 14 = ( 13-8)^2 - 4^2`
`=> ( 19x + 50 ) : 14 = 5^2 - 4^2`
`=> ( 19x + 50 ) : 14 = 9`
`=> 19x + 50 = 9*14`
`=> 19x + 50 = 126`
`=> x = ( 126 - 50 )/19`
`=> x = 4`
Vậy `x=4`
(19x + 2.5\(^2\) ) : 14 = 5\(^2\)- 4\(^2\)
(19x + 2.5\(^2\) ) : 14 = 9
19x + 2.5\(^2\) = 9.14
19x + 50 = 126
19x = 126-50=76;19
x = 4
\(\frac{3}{7}\left(7x+\frac{2}{3}\right)-2\left(\frac{5}{14}-3x\right)=\frac{15}{5}\)
\(\Leftrightarrow3x+\frac{2}{7}-\frac{5}{7}+6x=3\)
\(\Leftrightarrow9x=\frac{24}{7}\)
\(\Leftrightarrow x=\frac{8}{21}\)
\(\frac{3}{7}.\left(7x+\frac{2}{3}\right)-2.\left(\frac{5}{14}-3x\right)=\frac{15}{5}\)
\(\Leftrightarrow3x+\frac{2}{7}.x-\frac{5}{7}+6x=3\)
\(\Leftrightarrow\frac{65}{7}.x-\frac{5}{7}=3\)
\(\Leftrightarrow\frac{65}{7}.x=3+\frac{5}{7}\)
\(\Leftrightarrow\frac{65}{7}.x=\frac{26}{7}\)
\(\Leftrightarrow x=\frac{26}{7}:\frac{65}{7}\)
\(\Leftrightarrow x=\frac{2}{5}\)
( 19x + 2.52 ) : 14 = ( 13 - 8 )2- 4 2
( 19x + 2.52 ) : 14 = 52- 4 2
( 19x + 2.52 ) : 14 = 25- 16
( 19x + 2.52 ) : 14 =9
( 19x + 50 ) : 14 =9
19x + 50=9 . 14
19x + 50=126
19x=126-50
19x=76
x=76:19
x=4
https://olm.vn/hoi-dap/tim-kiem?q=%7C2x-9%7C+%7C3x-13%7C-%7C14-5x%7C+%7C19-(4x+12)%7C=56t%C3%ACm+x&id=191953
\(\Leftrightarrow\left[{}\begin{matrix}14-19x=7x-15\\19x-14=7x-15\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}26x=29\\12x=-1\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{29}{26}\\x=-\dfrac{1}{12}\end{matrix}\right.\)