Concepts of Algebra

Identify the variable in the following expression: 3x + 5 = 20

• 5

• x

• 3

• 20

Identify the constant in the following expression: 2y - 8 = 16

• y

• -8

• 16

• 2y

Identify the variable in the following expression: 4a + 7b = 28

• a, b

• p, q

• m, n

• x, y

Identify the constant in the following expression: 6c - 3 = 15

• c

• -3

• 3

• 6

Turn the algebraic phrase 'The sum of a number and 8 is 15' into an equation.

• x + 8 = 15

• x + 15 = 8

• 8x = 15

• x - 8 = 15

Turn the algebraic phrase 'Twice a number decreased by 5 is 11' into an equation.

• 2x - 5 = 11

• 2x - 11 = 5

• 2x + 5 = 11

• 5 - 2x = 11

Turn the algebraic phrase 'The product of 4 and a number is 20' into an equation.

• 4x = 20

• 4 + x = 20

• 4x + 20

• 4x - 20

Turn the algebraic equation 3x + 7 = 22 into a phrase.

• The phrase is '3x minus 7 equals 22.'

• The phrase is '3 times a number plus 7 equals 22.'

• The phrase is '3x plus 7 equals 22.'

• The phrase is '3x divided by 7 equals 22.'

Turn the algebraic equation 5y - 4 = 16 into a phrase.

• 5y plus 4 equals 16

• The phrase is '5 times y minus 4 equals 16.'

• 5y minus 16 equals 4

• 5y divided by 4 equals 16

Turn the algebraic equation 2z + 9 = 15 into a phrase.

• 2z plus 9 equals 15

• 2z minus 9 equals 15

• 2z times 9 equals 15

• The phrase is '2 times z plus 9 equals 15.'