2x+y−3=0 is it an equation of a straight line

An equation represents a straight line if the highest power of both variables ($x$ and $y$) is 1, and there are no products of variables (like $xy$).

Given the equation:

To isolate $y$, subtract $2x$ and add 3 to both sides:

The equation $y = -2x + 3$ is in the form $y=mx+c$, where $m=-2$ (the slope) and $c=3$ (the y-intercept). Since it can be expressed in this form, it represents a straight line.

The answer is $\text{Yes}$.