Question

Tìm x : 60% + 0,4x = 2

Answer 1

\(x:60\%+0,4x=2\)
\(\Rightarrow\dfrac{5}{3}x+0,4x=2\)
\(\Rightarrow\left(\dfrac{5}{3}+0,4\right)x=2\)
\(\Rightarrow\dfrac{31}{15}x=2\)
\(\Rightarrow x=2:\dfrac{31}{15}\)
\(\Rightarrow x=\dfrac{30}{31}\)
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Answer 2

60% + 0,4x=2

0,4x=2-60%

0,4x=2-0,6

0,4x=1,4

x=1,4:0,4

x=3,5

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Answer 3

\(\dfrac{60}{100}+0,4x=2\)

\(\dfrac{3}{5}+0,4x=2\)

\(0,4x=2-\dfrac{3}{5}\)

\(0,4x=\dfrac{7}{5}\)

\(x=\dfrac{7}{5}:0,4\)

\(x=3,5\)