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DO NOW
DO NOW
Can you figure out what x is? What number would make the statement true?
Can you figure out what x is? What number would make the statement true?
- x + 2 = 5
- 8 - x = 6
- 4x = 20
- 3x - 4 = 14
LEARNING TARGET
LEARNING TARGET
I can identify equations.
I can identify equations.
I can solve simple equations using mental math.
I can solve simple equations using mental math.
I DO
I DO
What is an equation?
What is an equation?
There are many different types of equations:
There are many different types of equations:
5 = 5
5 = 5
x = x
x = x
8x + 1 = 8x + 1
8x + 1 = 8x + 1
2 + 4 = 6
2 + 4 = 6
x = 5
x = 5
x + 4 = 7
x + 4 = 7
7x + 2 = 16
7x + 2 = 16
5x + 1 = 3x - 2
5x + 1 = 3x - 2
9(2x + 4) - 3 = 7(5 + 8x) + 5x
9(2x + 4) - 3 = 7(5 + 8x) + 5x
3x^2 - 4x + 8 = 21
3x^2 - 4x + 8 = 21
4 + |3x - 1| + 8x = 10
4 + |3x - 1| + 8x = 10
You will be able to solve all of these by the end of next year, and some of them by the end of this year!
You will be able to solve all of these by the end of next year, and some of them by the end of this year!
What does it mean to SOLVE an equation?
What does it mean to SOLVE an equation?
It means to find a value (or multiple values!) of the variable that make the equation true.
It means to find a value (or multiple values!) of the variable that make the equation true.
Let's take a look at testing solutions:
Let's take a look at testing solutions:
- Is x = 2 a solution to the following equation: x + 4 = 6
- Is x = 1 a solution to the following equation: 5x + 2 = 8
- Is x = 4 a solution to the following equation: 6x + 5 = x + 25
USING MENTAL MATH TO FIND SOLUTIONS:
USING MENTAL MATH TO FIND SOLUTIONS:
- x + 2 = 10
- 3x = 9
- 8 - x = 5
- 4x - 2 = 2
WE DO
WE DO
YOU DO
YOU DO
Challenge Work for a 4 (back for a 5!)
EXIT TICKET
EXIT TICKET
How could an equation have more than one solution? Can you think of an example?
How could an equation have more than one solution? Can you think of an example?
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