1. Name: Date: Mathematics: Working Backwards Doing the Opposite : Word Problems If you do not know what the number is use a box or a letter to represent it. Double means to multiply the number by 2 Challenge X 5 = 7 - 10 ? 1.A number added to 10 then multiplied by 3 gives 36, what is the number? 2.A certain number subtract 12 divided by 4 equals 9 3.A certain number when divided by 6 gives the same result as 40 multiplied by 5. 4.What number, when divided by 4, gives a result of 4? 5.When you multiply a number by 7 and add 10 to the answer, you get 38, What is the number? 6.When you multiply a number by 8 and subtract 15 from your answer, you get 49. What is the number? 7.A certain number is doubled and then 12 is added to it. The result is 64. What is the number? 8.If Liam doubles a number and subtracts 4, he will get 13. What is the number? 9.If Maria doubles a number and adds 5, she gets 29 . What is the number?