Algebra( Week 21 Practice) 1. If 12x is deducted by 9y, and the difference is then multiplied by , which of the following is the result? 2. Which of the following is the correct representation of phrase "7 less than 5 times x"? 3. 8 years ago, Alice was 5 years older than John is now. If John's present age is X, what will be Alice's age 5 years from now? 4. David is 3 years younger than Eric. Richard is half as old as Eric is now. If Richard will be 14 years old 7 years from now, how old is David now? 5. Andy is 3 times as old as Alice is now. 6 years from now, he will be twice as old as Alice then. How old is Alice now? |