# Unit 4: My Reflections

## Lesson 1: Number Puzzles

• I can solve puzzle problems using diagrams, equations, or other representations.

## Lesson 2: Keeping the Equation Balanced

• I can represent balanced hangers with equations.
• I can add or remove blocks from a hanger and keep the hanger balanced.

## Lesson 3: Balanced Moves

• I can add, subtract, multiply, or divide each side of an equation by the same expression to get a new equation with the same solution.

## Lesson 4: More Balanced Moves

• I can make sense of multiple ways to solve an equation.

## Lesson 5: Solving Any Linear Equation

• I can solve an equation where the variable appears on both sides.

## Lesson 6: Strategic Solving

• I can solve linear equations in one variable.

## Lesson 7: All, Some, or No Solutions

• I can determine whether an equation has no solutions, one solution, or infinitely many solutions.

## Lesson 8: How Many Solutions?

• I can solve equations with different numbers of solutions.

## Lesson 9: When Are They the Same?

• I can use an expression to find when two things, like height, are the same in a real-world situation.

## Lesson 10: On or Off the Line?

• I can interpret ordered pairs that are solutions to an equation.
• I can identify ordered pairs that are solutions to an equation.

## Lesson 11: On Both of the Lines

• I can use graphs to find an ordered pair that two real-world situations have in common.

## Lesson 12: Systems of Equations

• I can explain the solution to a system of equations in a real-world context.
• I can explain what a system of equations is.
• I can make graphs to find an ordered pair that two real-world situations have in common.

## Lesson 13: Solving Systems of Equations

• I can graph a system of equations.
• I can solve systems of equations using algebra.

## Lesson 14: Solving More Systems

• I can use the structure of equations to help me figure out how many solutions a system of equations has.

## Lesson 15: Writing Systems of Equations

• I can write a system of equations from a real-world situation.

## Lesson 16: Solving Problems with Systems of Equations

• I can use a system of equations to represent a real-world situation and answer questions about the situation.