IMO Algebra and Equations 2

Question 1

Solve: 4x − 6 = 2x + 8

Accepted Answer

7

Answer

5

Answer

9

Answer

11

Question 2

What is the value of x² + 2x when x = 3?

Accepted Answer

15

Answer

9

Answer

12

Answer

18

Question 3

Which of the following is a linear equation?

Accepted Answer

y = 3x + 2

Answer

y = x²

Answer

y = x³ + 1

Answer

y = 1/x

Question 4

If 5n = 45, what is n?

Accepted Answer

9

Answer

7

Answer

8

Answer

10

Question 5

Simplify: 3(2x − 4) + 5

Accepted Answer

6x − 7

Answer

6x − 1

Answer

6x + 5

Answer

5x − 7

Question 6

The sum of two numbers is 50. One number is 18. What is the other?

Accepted Answer

32

Answer

28

Answer

30

Answer

34