Ch 4 Expressions and Equations

Write an algebraic expression for the following word problem: If a number is increased by 5, the result is 12.

• x - 5 = 12

• x * 5 = 12

• x / 5 = 12

• x + 5 = 12

Solve the equation: 3x - 7 = 8

• x = 5

• x = 2

• x = 10

• x = 3

Write an algebraic expression for the following word problem: The sum of a number and 9 is multiplied by 4.

• x * 9 + 4

• 4x + 9

• 4x - 9

• (x + 9) * 4

Solve the equation: 2y + 5 = 17

• y = 8

• y = 10

• y = 3

• y = 6

Write an algebraic expression for the following word problem: 3 times the difference between a number and 6.

• 3x - 6

• 3x / 6

• 3(x - 6)

• 3(x + 6)

Solve the equation: 4a - 9 = 27

• a = 9

• a = 12

• a = 15

• a = 6

Write an algebraic expression for the following word problem: The product of a number and 5, decreased by 8.

• 5x + 8

• 5x / 8

• 5x + 8x

• 5x - 8

Write an algebraic expression for the following word problem: The difference between a number and 10 is divided by 3.

• (10 - x) / 3

• (x - 3) / 10

• (x + 10) / 3

• (x - 10) / 3

Solve the equation: 5c - 3 = 22.

• c = 3

• c = 7

• c = 5

• c = 10

Write an algebraic expression for the following word problem: The product of a number and 7, increased by 5.

• 7x + 5

• 7x - 5

• 5x + 7

• 5x - 7