Lesson 2 of 10

⚖ Solving One-Step Equations

🎓 Grades 9–12 ⏱ ~30 minutes 🟡 Foundational

What You'll Learn

  • The balance model: whatever you do to one side, do to the other
  • Solve equations using +, −, ×, ÷ as inverse operations
  • Check solutions by substituting back into the original equation
Quick Check

1. Solve: x + 8 = 15.

Ax = 7
Bx = 23
Cx = 6

2. Solve: 6x = 42.

Ax = 36
Bx = 7
Cx = 48

3. Solve: x/4 = 9.

Ax = 2.25
Bx = 36
Cx = 13

4. Which step isolates x in: x − 7 = 4?

AAdd 7 to both sides
BSubtract 7 from both sides
CMultiply both sides by 7
← Variables & Expressions Multi-Step Equations →