Seventh graders learn to solve two-step equations like 3x + 5 = 17 — undoing operations in reverse order to isolate the variable — a foundational skill for all of algebra.
Students will be able to…
In “3x + 5 = 17,” there are two things happening to x. How do you undo them both to find what x equals?
Project this and change the equation. Watch the two steps unfold — undo the addition, then undo the multiplication — to solve for x!
Tap any phase to open the teacher moves and student actions.
In 3x + 5 = 17, two things happen to x — how do we undo both?
Teacher models.
Class uses the Equation Solver.
Students solve.
One equation.
Aligned to the Common Core State Standards for Mathematics.
Solve two-step equations of the form px + q = r.
Use variables to solve real-world problems.
Solve multi-step problems with rational numbers.
Make sense of problems and persevere.
Preview the three formative checks. Tap “Sample answer” to see what mastery looks like — hide them before you print for students.
Have students solve equations with the variable on both sides, like 3x + 2 = x + 10. A printable equations sheet is in the Math library.
Tap a card to flip it, then rate whether you knew it. Built from this lesson’s vocabulary.
A quick self-check with instant feedback, drawn from this lesson’s key terms.
A print-and-go review sheet with a built-in answer key. Tap “Show answer key” to reveal answers, or print the clean version for students.