\(\left(2x-3\right)\cdot4,8=\left(3x+1\right)\cdot\left(-2,4\right)\)

\(9,6x-14,4=-7,2x-2,4\)

\(9,6x+7,2x=14,4-2,4\)

\(16,8x=12\)

\(x=\dfrac{12}{16,8}=\dfrac{5}{7}\)

x = 5/7

\(\dfrac{x^2+3x-4}{x-1}=\dfrac{x^2+4x-x-4}{\left(x-1\right)}=\dfrac{\left(x+4\right)\left(x-1\right)}{x-1}=x+4\)

\(M=5xy+\dfrac{3}{2}x^2-6y^2+2xy-4y^2+3x^2\)

\(M=\left(5xy+2xy\right)+\left(\dfrac{3}{2}x^2+3x^2\right)+\left(-6y^2-4y^2\right)\)

\(M=7xy+\dfrac{9}{2}y^2-10x^2\)

\(3^x+3^{x+2}=\left(-3\right)^3.\left(-10\right)\\ \Leftrightarrow3^x+9.3^x=270\\ \Leftrightarrow10.3^x=270\\ \Leftrightarrow3^x=27\\ \Leftrightarrow3^x=3^3\\ \Leftrightarrow x=3\)

\(\Rightarrow3^x\left(1+3^2\right)=3^3\cdot10\\ \Rightarrow3^x\cdot10=3^3\cdot10\\ \Rightarrow x=3\)

(2¹⁷ + 17²) . (9¹⁵ - 3¹⁵) . (2⁴ - 4²)

= (2¹⁷ + 17²) . (9¹⁵ - 3¹⁵) . (16 - 16)

= (2¹⁷ + 17²) . (9¹⁵ - 3¹⁵) . 0

= 0

X=214,5

bn nào nhanh mik tick cho nèk

\(x:3\times2=143\)

\(x:3=143:2\)

\(x:3=71,5\)

     \(x=71,5\times3\)

     \(x=214,5\)

\(\dfrac{1}{2}\left(x-2\right)+\dfrac{1}{3}\left(2-x\right)=x\\ \Leftrightarrow\dfrac{1}{2}\left(x-2\right)-\dfrac{1}{3}\left(x-2\right)=x\\ \Leftrightarrow\left(x-2\right).\left(\dfrac{1}{2}-\dfrac{1}{3}\right)=x\\ \Leftrightarrow\left(x-2\right).\left(\dfrac{3-2}{6}\right)=x\\ \Leftrightarrow\left(x-2\right).\dfrac{1}{6}=x\\ \Leftrightarrow\dfrac{1}{6}x-\dfrac{1}{3}-x=0\\ \Leftrightarrow\left(\dfrac{1}{6}-1\right)x=\dfrac{1}{3}\\ \Leftrightarrow\left(\dfrac{1-6}{6}\right)x=\dfrac{1}{3}\\ \Leftrightarrow\dfrac{-5}{6}x=\dfrac{1}{3}\\ \Leftrightarrow x=\dfrac{1}{3}:\left(-\dfrac{5}{6}\right)\\ \Leftrightarrow x=-\dfrac{2}{5}\)

Vậy \(x=-\dfrac{2}{5}\)

x= \(\dfrac{7\pm\sqrt{37}}{3}\) nha

x = 2/5

y \(\times\) 2 +\(\dfrac{y}{\dfrac{1}{3}}\) = 20

\(y\times2+y\div\dfrac{1}{3}=20\)

\(y\times2+y\times3=20\)

\(y\times\left(2+3\right)=20\)

\(y\times5=20\)

\(y=20\div5\)

\(y=4\)

y $\times$ 2 +�1331​y​ = 20

�×2+�÷13=20y×2+y÷31​=20

$y\times 2+y\times 3=20$

$y\times \left(2+3\right)=20$

$y\times 5=20$

$y=20÷5$

$y=4$

mn ơi giúp em vs ạ !!!

giúp e vs

a , \(x=2\left(\sqrt{x-1}-\sqrt{x-2}\right)\)

suy ra x =2 

b, x=3 

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