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# Module 5

### Solving systems of linear equations by graphing and substitution.

Is (4,1) a solution for: x + y = 5 x + 4y = 8 Yes
How do you find a solution to a system of linear equations by graphing? Graph the two equations and find the point where they intersect.
If you simplify 5(x + 1) + 6x - 3, what does it come out to be? 11x - 2
Are x = 1 and y = 1 parallel or intersecting lines? Intersecting.
To solve by substitution, what is the first step you must take? Find x or y for one of the equations.
If x is a single real number, what can you know about what the graph will look like? It will be a single vertical line crossing the real number on the x-axis.
Created by: 730538583