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  • https://math.libretexts.org/Courses/Long_Beach_City_College/Intermediate_Algebra/05%3A_Systems_of_Linear_Equations/5.2%3A_Solve_Systems_of_Equations_by_Substitution
    Solving systems of linear equations by graphing is a good way to visualize the types of solutions that may result. However, there are many cases where solving a system by graphing is inconvenient or i...Solving systems of linear equations by graphing is a good way to visualize the types of solutions that may result. However, there are many cases where solving a system by graphing is inconvenient or imprecise. If the graphs extend beyond the small grid with x and y both between −10 and 10, graphing the lines may be cumbersome. And if the solutions to the system are not integers, it can be hard to read their values precisely from a graph.

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