How to Use Elimination of Subtraction to Solve a System or Equations

The video tutorial explains the elimination method in solving equations, focusing on identifying coefficients and their signs. It demonstrates how to subtract equations with the same coefficients and solve for variables. The process of substituting the found value of X to determine the Y value is also covered, emphasizing the importance of handling double negatives correctly.

What is the first step in using elimination to solve equations?

• Find the same coefficient for different variables

• Find the same coefficient for the same variable

• Add the equations together

• Multiply the equations by different numbers

When should you subtract the equations during elimination?

• When the equations are already solved

• When the coefficients have the same sign

• When the coefficients have opposite signs

• When the coefficients are different

What happens when you subtract a negative number in an equation?

• It remains the same

• It becomes a positive number

• It becomes a larger negative number

• It becomes zero

After finding the value of one variable, what is the next step?

• Substitute the value into a new equation

• Solve for the same variable again

• Substitute the value into one of the original equations

• Add the value to both sides of the equation

What is the purpose of substituting the found value into one of the original equations?

• To verify the solution

• To simplify the equation

• To find a new equation

• To eliminate the variable