Choose variables to represent the unknown cuantities and with an expression or equation. 1. The sum of four and eight times a number is twenty. 2. The miss of Roman's father is 5 log less than 3 times Roman's muss 3. Twenty times a number less two 4. Three imes the difference of a number and one 5. Half a number decreased y twelve 6. The di ference between three and twice a number plus one 7. The product of a number ind nine 8. A rumber divided by thre, is eight 9. Six less than a number is forty-five 10. Ten added to a number