Systems of Equations - word problems

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What is a system of equations?

Back

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 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 variable.

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What does it mean for a system of equations to be consistent?

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A consistent system has at least one solution, meaning the equations intersect at one or more points.

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What does it mean for a system of equations to be inconsistent?

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An inconsistent system has no solutions, meaning the equations do not intersect at any point.

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What is a dependent system of equations?

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A dependent system has infinitely many solutions, meaning the equations represent the same line.

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

Back

Identify the variables, translate the relationships and conditions into equations, and set them up as a system.

Front

In the context of word problems, what does 'x' typically represent?

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'x' usually represents one of the unknown quantities that you are trying to find in the problem.

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

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Read the problem carefully to understand the relationships and identify the variables.

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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 verify that both equations are satisfied.