## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Refer to the step-by-step part below for the solution. $(1, -1)$ is also a solution of $2x-y=3$
An ordered pair is a solution of an equation if its x and y coordinates satisfy the equation. Substitute the x and y values of each ordered pair into the equation to check if they satisfy the equation. For $(0, -3)$: $2x-y=3 \\2(0)-(-3)=3 \\0+3=3 \\3=3$ Thus, $(0, -3)$ is a solution of the equation. For $(2, 1)$ $2x-y=3 \\2(2)-1=3 \\3=3$ Thus, $(2, 1)$ is a solution of the equation. Plot the two points and connect them using a line. (Refer to the image below for the graph.) Note that the point $(1, -1)$ is also on the line. Thus, $(1, -1)$ is also a solution of the equation $2x-y=3$