Question

$$3x+ \frac{ 2 }{ x } =7$$

Answer

x=1/3,2

Solution


Multiply both sides by \(x\).
\[3{x}^{2}+2=7x\]
Move all terms to one side.
\[3{x}^{2}+2-7x=0\]
Split the second term in \(3{x}^{2}+2-7x\) into two terms.
\[3{x}^{2}-x-6x+2=0\]
Factor out common terms in the first two terms, then in the last two terms.
\[x(3x-1)-2(3x-1)=0\]
Factor out the common term \(3x-1\).
\[(3x-1)(x-2)=0\]
Solve for \(x\).
\[x=\frac{1}{3},2\]

Decimal Form: 0.333333, 2