Solving Two-Step Equations
7th Grade•35 minutes•CCSS CCSS.MATH.CONTENT.7.EE.B.3
Learning Objective
I can solve two-step equations using inverse operations.
Key Concepts
When solving two-step equations, you must 'undo' two operations to get the variable all by itself.
To solve two-step equations, use the order of operations in reverse, which means you undo addition and subtraction before multiplication and division.
When an equation has a fraction line, the expressions above and below the line are treated as an 'implied' group, so you undo operations inside the group last.
Practice Questions
This lesson includes 3 practice questions to reinforce learning.
View questions preview
1. Solve for x: 3x - 5 = 16
2. Solve for y: (y + 3) / 2 = 5
3. Which operation should you perform FIRST to solve the equation 4x + 7 = 15?
Educational Video
Algebra Basics: Solving 2-Step Equations - Math Antics
mathantics