Extension - Order of Operations Algebra

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3n + 7 = 31
1. 8
2. Help
3. Study
6n – 2² = 68
1. 12
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(n + 1) ÷ 2 * 3 * 3 = 45
1. 9
2. Help
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Jill bought 3 apples. Then she spent $2.75 on oranges and $1.68 on candy. She received $2.75 change from her $10 bill. How much was each apple?
1. $0.94
2. Help!
3. Study