Question

a) (5x-1) . ( 2x-1/3)=0

b) ( -0,6x-1/2) .3/4-(-1)=1/3

c) ( 4x-9) ( 2,5+-7/3x)=0

d) 1/4x-1+1/3.(5/2x-6)-( 3/8x +)=4,5

 

 

Answer 1

mình cần khá gấp nhe

Answer 2

\(\left(5x-1\right)\left(\frac{2x-1}{3}\right)=0\)

\(\Leftrightarrow\left(\frac{\left(5x-1\right)\left(2x-1\right)}{3}\right)=0\)

\(\Leftrightarrow\left(5x-1\right)\left(2x-1\right)=0\)

\(\Rightarrow\orbr{\begin{cases}5x-1=0\\2x-1=0\end{cases}}\)\(\Rightarrow\orbr{\begin{cases}x=\frac{1}{5}\\x=\frac{1}{2}\end{cases}}\)

Vậy \(x=\frac{1}{5}\)hoặc\(x=\frac{1}{2}\)

Answer 3

b) \(\left(-0,6x-\frac{1}{2}\right).\frac{3}{4}-\left(-1\right)=\frac{1}{3}\)

\(\Leftrightarrow\left(-0,6x-\frac{1}{2}\right).\frac{3}{4}=\frac{-2}{3}\)

\(\Leftrightarrow\left(-0,6x-\frac{1}{2}\right)=\frac{-8}{9}\)

\(\Leftrightarrow-0,6x=\frac{-7}{18}\)

\(\Rightarrow x=\frac{35}{54}\)

Answer 4

ý a) \(\left(5x-1\right)\left(\frac{2x-1}{3}\right)=0\)

\(\Leftrightarrow\left(5x-1\right)\left(2x-1\right)=0\)

=> x=\(\frac{1}{5}\)hoặc x=\(\frac{1}{2}\)

Answer 5

c)\(\left(4x-9\right)\left(2,5+\frac{-7}{3}x\right)=0\)

\(\Rightarrow4x-9=0\) hoặc \(\frac{5}{2}+\frac{-7}{3}x=0\)

\(\Rightarrow x=\frac{9}{4}\)hoặc \(x=\frac{15}{14}\)

Answer 6

cho mk hỏi ý d (3/8x+?) với bao nhiêu vậy