Equations

Write an equation for the following word problem: If a number is increased by 8, the result is 20.

• x + 8 = 20

• x * 8 = 20

• x + 8 = 12

• x - 8 = 20

Answer explanation

Choose the equation where a number is increased by 8 to result in 20, so x + 8 = 20 is the correct choice.

Identify the variable in the equation: 6z / 2 = 9

• a

• y

• z

• x

Answer explanation

The variable in the equation is z because it is the unknown value that we are trying to solve for by isolating it on one side of the equation.

Tags

CCSS.6.EE.A.2B

Check if x = 6 is a solution for the equation: 3x - 2 = 16

• No, x = 7 is not a solution.

• No, x = 6 is not a solution.

• Yes, x = 5 is a solution.

• Yes, x = 6 is a solution.

Answer explanation

The equation is solved by substituting x = 6 into 3x - 2 = 16, which results in 3(6) - 2 = 16, simplifying to 18 - 2 = 16, proving x = 6 is a solution.

Tags

CCSS.6.EE.B.5

• 0

• 1

• -1

• 4

Tags

CCSS.8.EE.C.7B

• x=-10

• x=2

• No Solution

• All Real Numbers

Tags

CCSS.8.EE.C.7A

• 2

• -2

• 8

• 8

Tags

CCSS.8.EE.C.7B

• m=3

• m=-4

• m=-1

• All real numbers

• x=3

• x=2

• x=-2

• x=1

What is the value of t that satisfies the equation?

• 10
  

• 11

Tags

CCSS.8.EE.C.7B

• x=3

• x=-7

• x=0

• No Solution