Question

Find the value of the following expressions, when $x=-1;2x-7$.

Answer 1

Substitute $x=-1$in the given expression.

The given expression is $2x-7$.

$$\begin{gathered} =2\left(-1\right)-7 \\ =-2-7 \\ =-9 \end{gathered}$$

Hence, the required final answer is $-9$.