# 8.4 Linear Equations and Linear Systems

### Lesson 1

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

### Lesson 2

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

### Lesson 3

• 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

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

### Lesson 5

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

### Lesson 6

• I can solve linear equations in one variable.

### Lesson 7

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

### Lesson 8

• I can solve equations with different numbers of solutions.

### Lesson 9

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

### Lesson 10

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

### Lesson 11

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

### Lesson 12

• 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

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

### Lesson 14

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

### Lesson 15

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

### Lesson 16

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