Question

Tìm x:

\(\dfrac{15}{2x-1}=\dfrac{5}{3}\)

Answer 1

\(\dfrac{15}{2x-1}=\dfrac{5}{3}\) (ĐK: \(x\ne\dfrac{1}{2}\))

\(\Leftrightarrow3\cdot15=5\left(2x-1\right)\)

\(\Leftrightarrow45=10x-5\)

\(\Leftrightarrow10x=50\)

\(\Leftrightarrow x=5\) (T/m)

Answer 2

\(\dfrac{15}{2x-1}=\dfrac{5}{3}\)
\(\Rightarrow\left(2x-1\right).5=3.15\)
\(\Rightarrow\left(2x-1\right).5=45\)
\(\Rightarrow2x-1=45:5\)
\(\Rightarrow2x-1=9\)
\(\Rightarrow2x=9+1\)
\(\Rightarrow2x=10\)
\(\Rightarrow x=10:2\)
\(\Rightarrow x=5\)
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