Solving Two-Step Equations Lesson

Solving Two-Step Equations Lesson

By: J. Deberry

Integers Review!

• Examples:

  • 5 + (-12) =

  • 9 - (-3) =

  • -4 x (-2) =

  • -12 / 4 =​

Multiple Choice

Quick Check:

When you add numbers with DIFFERENT signs you....

• Subtract, then take the sign of the BIGGER number

• Add, then take the sign of the SMALLER number

• Add normally

• Do nothing

Multiple Select

Quick Check:

Same signs = POSITIVE answer

This is the rule for...

• Adding integers

• Subtracting integers

• Multiplying integers

• Dividing integers

Multiple Choice

Quick Check:

Choose the EQUIVALENT expression for 14 - 25

• 14 + 25

• 14 - (-25)

• 14 + (-25)

​Solving Equations Check-list

• ​The OPPOSITE of the Order of Operations

• Ask yourself... "Do I see [operation]? If so, do the OPPOSITE!

• You aren't finished unless you have a checkmark for all four operations!​

Multiple Choice

Quick Check:

What comes first when solving the equation 5x + 3 = -7?

• Divide by 5

• Add 3

• Subtract 3

• Multiply by 5

Multiple Choice

Quick Check:

What comes first when solving the equation x/6 - 4 = -10?

• Add 4

• Subtract 4

• Divide by 6

• Multiply by 6

How do I know if I'm correct?!

• Remember substituting variables?

• Whatever solution you find, plug it back into your equation.

• If the sentence is TRUE, your answer is correct!​

• Example: Who is correct?

  • Sally says the solution to 6x + 3 = 27 is x=7

  • Sam says the solution to 6x + 3 = 27 is x=4​

Multiple Choice

Quick Check:

-3x - 5 = -11

Solution: x = 2

True or False?

• True

• False

Poll

After working with solving equations and integers for the first week and today, how are you feeling about your progress?

• I have NO CLUE what I'm doing

• I'm getting better but need more help

• It's so easy I can do this in my sleep!