Solving linear equations
- I can solve a two-step equation by undoing the operations in reverse order.
- I can verify a solution by substituting it back into the equation.
Do now: undo itSTARTER
Brain dumpAnswer the five questions on the board, then write what equation, inverse and solution mean.
Worked example pairs: balance and undoMAIN
Worked example pairsModel x + 8 = 15, then 3x + 5 = 20 with a check line. Students solve each twin and explain it to a partner.
Show me: solve and verifyMAIN
Mini-whiteboards4a + 3 = 23, 6w − 4 = 32. Questions 3 and 4 are the decision point.
Equation problemsMAIN
Think-pair-shareWrite an equation for each story, solve it and verify by substitution.




