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Substitution:This method is used to replace variables with an expression
System of Linear Equation: is a set of two or more linear equations containing two or more variables
System of Nonlinear Equation: A system that has set of equations where one or more terms have a variable of degree two or higher
System of Inequalities: A system in which two variables consist of at least tow linear inequalities
No solution: Inconsistent system, graph makes parallel lines
One solution: Point of intersection
Infinite solutions :More then one solution
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