Simultaneous Equations - the Elimination Method - How to solve - Math Lesson | Summary and Q&A

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August 27, 2020
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tecmath
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Simultaneous Equations - the Elimination Method - How to solve - Math Lesson

TL;DR

This video explains how to solve simultaneous equations by adjusting the coefficients to match and using elimination, with detailed examples.

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Questions & Answers

Q: What are simultaneous equations?

Simultaneous equations are a set of equations with multiple variables that are solved together to find the values of the variables that satisfy both equations.

Q: How does the elimination method work?

The elimination method involves adjusting the equations so that the coefficients in front of one variable match in both equations. Then, one equation is subtracted from the other to eliminate that variable, allowing for the solution.

Q: What should be considered when multiplying equations to match coefficients?

When multiplying equations, it's important to choose a number that can be used to multiply the coefficients of one variable in both equations to obtain matching coefficients. This simplifies the elimination process.

Q: Why is it recommended to substitute the derived values back into the equations?

Substituting the values back into the equations helps to verify the accuracy of the solutions. If the values satisfy both equations, then the solutions are correct.

Summary & Key Takeaways

  • The video provides an overview of simultaneous equations, explaining variables, coefficients, and naming equations.

  • The elimination method is introduced, which involves adjusting the equations to have matching coefficients for one variable.

  • Two examples are given, showing the step-by-step process of solving simultaneous equations using the elimination method.

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