Multiply by a reciprocal

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Presentation transcript:

Multiply by a reciprocal Solve Two-Step Equations 4.3 Use _______________ __________________ to isolate the variable. THINK about Hands-On Equations and the order in which we isolated the variable. BE CAREFUL with negatives! To UNDO multiplication by a fraction: 1. 3. 5. 2. 4. 6. INVERSE OPERATIONS Multiply by a reciprocal

Write each scenario as an equation and solve it. 7. You are planning to plant a small garden. Your supplies (tools and fertilizer) cost $16. Each plant costs $.60. You have $35 to spend on the garden. How many plants can you get? (The prices include sales tax.) 8. Darin, Mary and Keith are all siblings two years apart in age. The sum of their ages is 45. How old is the youngest? How old is the oldest? 9. The perimeter of a triangle is 28 cm. The shortest side is x cm long and the longest side is 5 cm longer than the shortest side. The third side is 3 shorter than the longest side. Find the lengths of the triangle’s sides.