1. Today’s Learning Goals:
I can tell when it is useful and can use concrete models or diagrams to solve an equation
I can recognize that solving an equation means determining an equivalent equation where the solution is more obvious

2. The Equation Game

3. Why is an equation like a balance scale?= 3
2x - 1

4. The equation game has one rule …
… do the same action
on both sides.

5. =
2x - 1 3 2x
- 1 3

6. =
2x - 1
+ 1 3
Why did we add one
red tile to each side?

7. 2x = 4 =
2x - 1
+ 1 3
+ 1
The action on
both sides is…
SIMPLIFY!

8. 2x = 4
Two groups of “x” is 4.
What is one group of “x”?

9. 2x = 4 2
x = 2

10. =
2x - 1 3
How can you check
your answer?

11. =
2x - 1 3
Replace each “x”
with 2 “ones”.
3 = 3

12. x = -3 = -x 3 … what if? If two sides of an equation are equal
then the opposites of the two sides are equal.

13. = -x 3
x = -3
When you “flip” both sides how are you following the one rule of the Equation Game?