Equations

The objective when solving an equation is to....

• isolate the variable.
• check the solution.
• guess and check.
• Combine Like Terms.

What is the first step to solve this equation:
11 - 3x = 44

• Add 3 to both sides
• Subtract 11 from both sides
• Add 11 to both sides
• Divide 3 on both sides.

x + 12 = 20

• x = 32
• x = -32
• x = 8
• x = -8

17 = x + 3

• x = 20
• x = 14
• x = 13
• x = 19

x - 32 = 49

• x = 17
• x = 71
• x = 81
• x = 49

x - 62 = 123
How should you show your work to isolate the variable and solve the equation?

• Add 62 to each side. 
• Subtract 62 from each side.
• Multiply each side by 62.
• Add 123 to each side.

10x = 90

• x = 80
• x = 100
• x = 10
• x = 9

x ÷ 2 = 12

• x = 24
• x = 6
• x = 20
• x = 10

6 - 3a = 21

• a= 9
• a= -9
• a= -5
• a= 5

-3a + 8 = 14

• a= -2
• a= -7.5
• a= 2
• a= 6