Mastering Linear Equations

Solve for x: 3x + 5 = 20

• 15

• 5

• 0

• 10

Identify the variable and constant in the equation: 2y - 7 = 13

• Variable: x, Constants: 2, 7, 13

• Variable: y, Constants: 2, -7, 13

• Variable: z, Constants: 3, -7, 13

• Variable: y, Constants: 2, -7, 12

Translate this word problem into an equation: A number decreased by 4 equals 10.

• 4x = 10

• x - 4 = 10

• x + 4 = 10

• x - 10 = 4

Solve for x: 5(x - 2) = 15

• 3

• 7

• 5

• 10

Identify the variable in the equation: 4a + 9 = 25

• 4

• 9

• 25

• a

Translate this word problem: The sum of a number and 12 is 30.

• The number is 12.

• The number is 24.

• The number is 18.

• The number is 6.

Solve for x: 7x = 42

• 8

• 7

• 5

• 6

Identify the constant in the equation: 9b - 3 = 0

• 3

• -3

• 0

• -9

Translate this word problem: Three times a number is equal to 21.

• The number is 5.

• The number is 10.

• The number is 3.

• The number is 7.

Solve for x: 2(x + 3) = 16

• 3

• 8

• 10

• 5