Solving a system of equations with infinite many solutions

Why might a teacher prefer the elimination method over substitution when solving equations?

• It requires fewer steps.

• It works better when coefficients are not 1 or -1.

• It is always faster.

• It is more accurate.

What is the first step in the elimination method according to the teacher?

• Multiplying the equations by zero.

• Aligning the variables in the equations.

• Solving for one variable.

• Finding the greatest common divisor.

Why is it important for the coefficients to have the same absolute value in elimination?

• To make the equations easier to read.

• To allow for the addition or subtraction of equations to eliminate a variable.

• To ensure the equations are balanced.

• To simplify the multiplication process.

What is the purpose of finding a common multiple for coefficients in the elimination method?

• To make the equations longer.

• To eliminate the need for substitution.

• To ensure the coefficients are the same, allowing for elimination.

• To check the accuracy of the equations.

What should you multiply by to make the coefficient of -2 equal to 10?

• 4

• 5

• 3

• 2