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Solving Two-Step Equations #34 Example 1 Solve each equation. 18 + 3x = 30 FYI Helpful Hint Undo operations in the reverse of the Order of Operations. First undo addition or subtraction. Then undo multiplication or division. Example 2 Solve. Check the answer. x –2= 3 1 Example 3 Solve. Check the answer. x + 19 = 4 6 Example 4 Solve each equation . x – 16 = 3 9 Example 5 Solve. Check the answer. x-9 10 = 49 Example 6 The rule for a certain function is to multiply the input by 5 and subtract 4. Find the input value when the output is 11. Real-world Application 1 Kaia earned $425 last week. She wants to put $350 in the bank and buy some DVDs. Each DVD costs $25. Write a two-step equation to represent the situation. Then solve the equation. How many DVDs can she buy? Real-world Application 2 Nancy saved $87 of the money she made babysitting. She wants to buy CDs that cost $15 each, along with a set of headphones that costs $12. How many CDs can she buy?