Question

$$\frac{ 5x }{ 4 } -7= \frac{ 1 }{ 2 }$$

Answer

x=6

Solution


Add \(7\) to both sides.
\[\frac{5x}{4}=\frac{1}{2}+7\]
Simplify  \(\frac{1}{2}+7\)  to  \(\frac{15}{2}\).
\[\frac{5x}{4}=\frac{15}{2}\]
Multiply both sides by \(4\).
\[5x=\frac{15}{2}\times 4\]
Use this rule: \(\frac{a}{b} \times c=\frac{ac}{b}\).
\[5x=\frac{15\times 4}{2}\]
Simplify  \(15\times 4\)  to  \(60\).
\[5x=\frac{60}{2}\]
Simplify  \(\frac{60}{2}\)  to  \(30\).
\[5x=30\]
Divide both sides by \(5\).
\[x=\frac{30}{5}\]
Simplify  \(\frac{30}{5}\)  to  \(6\).
\[x=6\]