Solving Variables in Equations

Which value of k will make the equation below true?

12 = (20 - k) x 3

• k = 16

• k = 4

• k = 8

• k = 12

Which of the following expressions shows b = 11?

• b = (3 + 2) x 5 - 1

• b = 3 + (2 x 5) - 1

• b = 3 + 2 x (5 - 1)

• b = 3 + (2 x 5 - 1)

Which value of h will make the equation below true?

6 = 36 ÷ (h - 3)

• h = 6

• h = 12

• h = 3

• h = 9

Which of the following expressions shows m = 12?

• m = 15 ÷ (3 + 2 x 4)

• m = 15 ÷ (3 + 2) x 4

• m = 15 ÷ 3 + (2 x 4)

• m = (15 ÷ 3 ) + 2 - 4

Which value of m will make the equation below true?

8 = m ÷ (2 x 5)

• m = 80

• m = 10

• m = 40

• m = 20

Which of the following expressions shows n = 3?

• n = (20 - 5) ÷ 3 + 2

• n = 20 - 5 ÷ (3 - 2)

• n = 20 - (5 ÷ 3) + 2

• n = (20 - 5) ÷ (3 + 2)

Which value of k will make the equation below true?

15 = (2k) - (6 ÷ 2)

• k = 3

• k = 10

• k = 6

• k = 9

A farmer has 14 rows of yellow corn in his farm. He plants 20 yellow corn seeds in each row. He also has 10 rows of white corn, where he plants 12 white corn seeds in each row. Which equation shows how to find c, the number of corn seed the farmer plants in his garden?

• c = (14 + 20) x (10 + 12)

• c = (14 + 20) + (10 + 12)

• c = (14 x 20) + (10 x 12)

• c = (14 x 20) x (10 x 12)

Miss Marv is giving crayons to her students. She has a total of 88 crayons and gives an equal number to her 22 students. Which equation shows how to find c, the total number of crayons she gives to 4 of her students?

• c = 88 x (22 - 4)

• c = 22 - (88 ÷ 4)

• c = 88 ÷ (22 x 4)

• c = (88 ÷ 22) x 4

The 5th grade students are going on a field trip to the museum. The students will need four buses, each containing 18 students and two buses, each containing 22 students to get to the museum. What equation shows how to find s, the total number of 5th grade students that are going to the museum?

• s = (4 + 18) + (2 + 22)

• s = (4 x 18) x (2 x 22)

• s = (4 + 18) x (2 + 22)

• s = (4 x 18) + (2 x 22)