A system of two linear equations such as x + y = 6 and x – 2y = 3, is called a pair of simultaneous linear equations in two variables x and y.
A solution of this system is a pair of values of x and y that satisfy both equations. Thus, if a solution exists, it is the coordinates of the point of intersections of the graphs of the simultaneous equations.
Below is a video that might be helpful:
https://www.khanacademy.org/math/algebra-basics/core-algebra-systems/core-algebra-systems-tutorial/v/solving-linear-systems-by-graphing
Homework: Exercise 2.2 (page 52) # 1 – 4
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