The video tutorial by Mr. Iregal covers solving systems of equations using substitution and elimination methods. It begins with an introduction to the concepts, followed by detailed explanations and examples of each method. The substitution method involves isolating a variable and substituting it into another equation, while the elimination method focuses on canceling out variables by using opposite coefficients. The video concludes with a summary and pointers to additional resources for further learning.

What is the first step in solving a system of equations by substitution?

• Add the equations together

• Isolate one variable in one of the equations

• Multiply both equations by a constant

• Graph the equations

When substituting, what do you replace in the second equation?

• The entire equation

• The isolated variable

• The constant term

• The coefficient of x

How do you verify the solution of a system solved by substitution?

• Check if the solution satisfies both original equations

• Multiply the solution by a constant

• Only check the first equation

• Graph the solution

In the second system, what was the first step to isolate the variable?

• Subtract a variable from both sides

• Multiply both sides by a constant

• Divide both sides by a coefficient

• Add a constant to both sides

What is the purpose of verifying a solution in a system of equations?

• To find a new solution

• To eliminate one of the variables

• To ensure the solution satisfies both equations

• To simplify the equations

What is the main goal when using the elimination method?

• To graph the equations

• To substitute one equation into the other

• To eliminate one of the variables

• To add the equations together

How do you achieve opposite coefficients in elimination?

• Subtract one equation from the other

• Divide both equations by a constant

• Multiply one or both equations by a constant

• Add a constant to both equations

What is the final step in verifying a solution obtained through elimination?

• Add the solution to the original equations

• Multiply the solution by a constant

• Graph the solution

• Check if the solution satisfies both original equations