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What is a system of equations?

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A system of equations is a set of two or more equations with the same variables. The solution is the point(s) where the equations intersect.

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How do you solve a system of equations using substitution?

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1. Solve one equation for one variable. 2. Substitute that expression into the other equation. 3. Solve for the remaining variable.

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What is the graphical representation of a system of equations?

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The graphical representation is the intersection point(s) of the lines representing each equation on a coordinate plane.

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What does it mean if two lines are parallel in a system of equations?

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If two lines are parallel, it means there is no solution to the system, as the lines never intersect.

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What does it mean if two lines coincide in a system of equations?

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If two lines coincide, it means there are infinitely many solutions, as every point on the line is a solution.

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How can you represent a word problem as a system of equations?

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Identify the variables, translate the relationships and conditions into equations, and set them equal to each other.

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What is the first step in solving a word problem involving a system of equations?

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Identify the variables that represent the unknown quantities in the problem.

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How do you check your solution for a system of equations?

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Substitute the solution back into the original equations to see if both equations are satisfied.

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What is the elimination method in solving systems of equations?

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The elimination method involves adding or subtracting equations to eliminate one variable, making it easier to solve for the other.

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What is the importance of defining variables in word problems?

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Defining variables helps clarify what each unknown represents, making it easier to set up equations.