Question

tim x

a, 25%.x=0,5

b,[x-5/2].[3x-7/4]=0

ai nhanh minh tick cho

 

Answer 1

a)x=2

Answer 2

a, 25%.x=0,5

    0,25.x=0,5

             x=0,5:0,25

             x=2

Answer 3

a) => 25x% =50%

=>25x =50

=>x=2

b) 2x-5/2=0 hoặc 12x-7/4=0

=>2x-5=0 hoặc 12x-7 =0

Answer 4

\(\orbr{\begin{cases}x-\frac{5}{2}=0\\3x-\frac{7}{4}=0\end{cases}}\)

\(\orbr{\begin{cases}x=\frac{5}{2}\\3x=\frac{7}{4}\end{cases}}\)

\(\orbr{\begin{cases}x=\frac{5}{2}\\x=\frac{7}{12}\end{cases}}\)