How to Use Elimination of Addition to Solve a System

The video tutorial covers the methods of solving equations using addition and subtraction. It explains the conditions under which each method is applicable, emphasizing the importance of having the same coefficients for elimination. The tutorial demonstrates solving a problem using both addition and subtraction, highlighting that the same result can be achieved with either method when conditions are met. Key points include ensuring coefficients are the same and understanding when to add or subtract based on the signs and values of the coefficients.

What is a common issue when using subtraction in solving equations?

• It requires complex calculations.

• It is not applicable to any equations.

• It can lead to mistakes if not careful.

• It always results in negative numbers.

When can addition be used in solving equations?

• When the coefficients are zero.

• When the coefficients are the same.

• When the coefficients are different.

• When the coefficients have the same sign.

In the given problem, what was the result of using addition to solve for X?

• X = 4

• X = 3

• X = 1

• X = 2

What is the result of using subtraction to solve for Y in the problem?

• Y = 0

• Y = 1

• Y = 2

• Y = 3

Under what condition should subtraction be used in solving equations?

• When coefficients are the same and have the same sign.

• When coefficients are different and have different signs.

• When coefficients are the same and have different signs.

• When coefficients are different and have the same sign.