2.What must be added to 6 to make it 18 ?, A.2 B.4 C.6 D.8 , 3.What is the solution of x+2=17, A. 19 B. 15 C. -15 D. -19, 4.What is the solution of 28 – x = 20? , A.12 B.14 C.16 D.18, 5.What must be added to both sides of the equation: x – 12 = 15 to isolate the variable? , A. -15 B. -12 C. 12 D. 15, 6.What must be the difference it twenty and eight? , A.10 B.12 C.14 D.16, 7.What is the three times a number increased by six is 21? , A.5 B.6 C.8 D.12, 8.If x = 2 , which of the following equation is correct? , A.2x – 1 = 3 B.2x + 5 = 11 , C.3x – 6 = 9 D.3x + 6 = 12, 9.Which property of equality should be used to isolate the variable in the equation 7x = 63? , A.addition B.division , C.multiplication D.Subtraction , 10.Which of the following is the solution set of the equation 8x + 12 = 5x – 21? , A. -11 B. -6 C. 3 D. 10, 11.What is the solution set of 4(x + 2) 8 = 80? , A.8 B.10 C.16 D.20 , 12.Which of the following can be used as a replacement for b and 6b – 24 = 2b + 48 ? , A.6 B.12 C.18 D.24, 13.If x=2, which of the following equation is correct? , A.2x – 1 = 3 B.2x + 5 = 11 , C.2x – 6 = 9 D.2x + 6 = 12 , 14.If x = 3, which of the following equation is correct? , A.2x – 5 = 5 B.2x + 5 = 11 , C.3x – 6 = 9 D.3x + 6 = 12, 15.Which step should you take to solve the equation x – 11 = 45? , A.add 11 to each side , B.add 45 to each side , C.subtract 11 from each side , D.subtract 45 from each side ,