Basic Algebra Quiz

If 5x = 25, what is x?

• 4

• 10

• 5

• 6

Answer explanation

To find x, divide both sides of the equation 5x = 25 by 5. This gives x = 25 / 5, which simplifies to x = 5. Therefore, the correct answer is 5.

Tags

CCSS.6.EE.B.7

If x/8 = 6, what is x?

• 14

• 38

• 48

• 42

Answer explanation

To find x, multiply both sides of the equation x/8 = 6 by 8. This gives x = 6 * 8, which simplifies to x = 48. Therefore, the correct answer is 48.

Tags

CCSS.6.EE.B.7

If x + 9 = 15, what is x?

• 7

• 8

• 5

• 6

Answer explanation

To find x, subtract 9 from both sides of the equation: x + 9 - 9 = 15 - 9. This simplifies to x = 6. Therefore, the correct answer is 6.

Tags

CCSS.6.EE.B.7

If x - 7 = 10, what is x?

• 3

• 17

• 12

• 13

Answer explanation

To solve for x, add 7 to both sides of the equation: x - 7 + 7 = 10 + 7, which simplifies to x = 17. Therefore, the correct answer is 17.

Tags

CCSS.6.EE.B.7

If 4x + 5 = 29, what is x?

• 6

• 5

• 4

• 8

Answer explanation

To solve for x, subtract 5 from both sides: 4x = 24. Then, divide by 4: x = 6. Thus, the correct answer is 6.

Tags

CCSS.7.EE.B.4A

If 3x - 8 = 16, what is x?

• 7

• 9

• 8

• 10

Answer explanation

To solve for x, add 8 to both sides: 3x = 24. Then, divide by 3: x = 8. Thus, the correct answer is 8.

Tags

CCSS.7.EE.B.4A

If 2(x + 5) = 20, what is x?

• 7

• 5

• 8

• 2

Answer explanation

To solve 2(x + 5) = 20, first divide both sides by 2: x + 5 = 10. Then, subtract 5 from both sides: x = 5. Thus, the correct answer is 5.

Tags

CCSS.7.EE.B.4A

If 8(x - 2) = 32, what is x?

• 5

• 6

• 4

• 8

Answer explanation

To solve 8(x - 2) = 32, divide both sides by 8: x - 2 = 4. Then, add 2 to both sides: x = 6. Thus, the correct answer is 6.

Tags

CCSS.7.EE.B.4A

If 5x + 4 = 3x + 16, what is x?

• 6

• 5

• 4

• 8

Answer explanation

To solve for x, first subtract 3x from both sides: 5x - 3x + 4 = 16. This simplifies to 2x + 4 = 16. Next, subtract 4 from both sides: 2x = 12. Finally, divide by 2: x = 6. Thus, the correct answer is 6.

If 7x - 4 + 3x = 36, what is x?

• 3

• 4

• 5

• 6

Answer explanation

To solve for x, combine like terms: 7x + 3x = 10x. Then, add 4 to both sides: 10x = 40. Finally, divide by 10: x = 4. Thus, the correct answer is 4.

Tags

CCSS.7.EE.B.4A