Question

Solve the equation. Check your solution.

$\frac{-w}{20}=-2.5$

Answer 1

Step 1 : Solve the inequality

$\Rightarrow \frac{-w}{20}=-2.5$

$\Rightarrow \frac{-w}{20}\times -20=–2.5\times -20$ [ Multiply both sides by $-20$ ]

$\therefore w=50$

Step 2 : Checking the solution

Check the solution by putting $w=50$ in the given inequality

We have,

$\Rightarrow \frac{-w}{20}=–2.5$

$$\begin{gathered} \Rightarrow \frac{-50}{20}=–2.5 \\ \Rightarrow -2.5=-2.5 \\ \Rightarrow \mathrm{LHS}=\mathrm{RHS} \end{gathered}$$

Hence, the required solution is $w=50$.