Question

If $m=\frac{1}{2}$ and $n=\frac{-3}{4}$, find the value of: $3m-n$

Answer 1

Given expression: $3m-n$ and $m=\frac{1}{2}$ and $n=\frac{-3}{4}$

We will put the value of $m$ and $n$ in given expression:

$$\begin{gathered} 3m-n=3\left(\frac{1}{2}\right)-\left(\frac{-3}{4}\right) \\ =\frac{3}{2}+\frac{3}{4}=\frac{6+3}{4}\{takinL.C.M\} \\ =\frac{9}{4} \end{gathered}$$

$\frac{9}{4}$, is the required value of expression.

Final Answer: $\frac{9}{4}$, is the required value of expression.