Chapter 7 - Algebra: Graphs, Functions, and Linear Systems - 7.3 Systems of Linear Equations in Two Variables - Exercise Set 7.3 - Page 446: 70

The disadvantage of this method involves a visual understanding of the system of linear equations that proves to be tedious when the solution of the system of equations involves fraction or decimals that are difficult to be plotted on a graph.

A system of equations can be solved by graphing the equations on a graph in the same rectangular coordinate system. The solution of the system of equations is done by determining the coordinates of point of intersection of equations which together form the system of linear equations. But there is a disadvantage of this method because, this method involves a visual understanding of the system of linear equations that proves to be tedious when the solution of the system of equations involves fraction or decimals that are difficult to be plotted on a graph.