Substitution Basics

Which best describes a solution to a system of equations?

How do you know when a system is ready for substitution?

• You just guess

• All the variables "line up"

• No, you need to divide -1 on both sides.

• No, you need to add y on both sides.

• No, you need to just erase the negative sign.

Solve the system.

Solve the system.

How many solutions will the system have?

• One

• None

• Infinitely Many

• Not Enough Information

How many solutions will the system have?

• One

• None

• Infinitely Many

• Not Enough Information

How many solutions will the system have?

• One

• None

• Infinitely Many

• Not Enough Information

Is the student finished solving?

• No, you need to find what y equals.

• No, you can't have negative answers.

• There is no solution.