7. Which of the following mathematical phrase corresponds to "Twenty-five more than a number? 25 + x b. x+ 25 c. X-25 d. 25 - X 8. Which is the correct mathematical statement of "Three times the difference between a number and three is equ twenty-one? 3x- 321 b. 3(x-3) = 21 c. 3x+3 = 21 d. 3(3-X) = 21