How to Solve an Equation

Solve the equation
a - 40 = 57

• 17

• 28

• 97

• 99

Solve the equation
c - 21 = 45

• 66

• 62

• 24

• none of the above

Solve the equation

y + 8.3= 12.7

• 28

• 21

• 4.2

• 4.4

Solve the equation.
54 = s + 34

• s= 10 

• s=20 

• s=34

• s=14

Solve for the equation
f - 22 = 36

• f= 62

• f= 14

• f=58

• f= 12

What property states that you can add the same number to both sides of an equation and the two sides will remain equal.

• distributive property

• addition property of equality

• commutative property

• associative property

Which equation best first the following situation?

Some surfers recommend that a beginner's surfboard be 14 inches greater than the surfer's height. If a surfboard is 82 inches, how tall should the surfer be to ride it?

• 96 inches

• 68 inches

• h - 14 = 82

• h + 14 = 82

The average length of a King Cobra is 118 inches, which is 22 inches longer than a Black Mamba. What is the average length of a Black Mamba (m)?

• 118 + 22 = m

• m + 22 = 118

• m - 22 = 140

• 118 = 22 - m

In the equation
x + 7 = 12
7 is being added to the variable, x. How should you show your work to isolate the variable and solve the equation? 

• Subtract 7 from both sides. The solution is x = 5.

• Add 7 to both sides.
  The solution is x = 19.

• Multiply both sides by 7 The solution is x = 84.

Solve the equation
3x = 27. 

• x = 24

• x = 81

• x = 9