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The Equation Game
Why is an equation like a balance scale?
32x - 1 =
The equation game has one rule …
… do the same action on both sides.
2x - 1 3
=2x - 1 3
=
Why did we add onered tile to each side?
2x - 1 + 1+ 1 3
=2x - 1 + 1+ 1 32x = 4 The action onboth sides is…SIMPLIFY!
2x = 4
Two groups of “x” is 4.What is one group of “x”?
2x = 4
x = 2
2 2
=2x - 1 3
How can you checkyour answer?
=2x – 1 3
3 = 3
Replace each “x”with 2 “ones”.
2(2) - 1
=-x 3… what if?
If two sides of an equation are equal
then the opposites of the two sides are equal.
x = -3
=-x 3
When you change the signs of both sides, how are you following the one rule of the Equation Game?
x = -3
Play the Equation Game with a partner
Solve each equation.Check your solution.
1. 3x - 2 = 42. 4x + 1 = -73. -4 = 2 + 2a 4. 3 - b = -25. -4x + 1 = -36. 3t + 6 = 9
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