Question

tìm x biết: x/10= 1/2+2/5+3/10

Answer 1

\(\dfrac{x}{10}=\dfrac{1}{2}+\dfrac{2}{5}+\dfrac{3}{10}\)

\(\dfrac{x}{10}=\dfrac{5}{10}+\dfrac{4}{10}+\dfrac{3}{10}\)

\(\dfrac{x}{10}=\dfrac{12}{10}\)

\(=>x=12\)

Answer 2

=>x/10=5/10+4/10+3/10=12/10

=>x=12

Answer 3

\(\Rightarrow\cdot\dfrac{x}{10}=\dfrac{5}{10}+\dfrac{4}{10}+\dfrac{3}{10}=\dfrac{12}{10}\Rightarrow x=12\)

Answer 4

x/10 = 1/2 + 2/5 + 3/10 

= x/10 = 5/10 + 4/10 + 3/10 

= 12/10 => x = 12