- Pull down one pawn from each side of the equation leaving:
3x + 2 = 2x +9
- Pull down another pawn from each side of the equation leaving:
2x + 2 = x + 9
- Pull down another pawn from each side of the equation leaving:
x + 2 = 9
- Now pull down 2 from each side of the equation leaving:
x = 7
- We have just solved for x. Now, we replace our manipulatives to show the original equation:
4x + 2 = 3x +9
- Replace "x" with the value "7" and solve:
4 x 7 + 2 = 3 x 7 + 9
28 + 2 = 21 + 9
30 = 30
I have made a short video demonstrating this lesson, just follow the link: Hands-On Equations Day 4.
HOMEWORK:
- xtramath.org
- Countdown, p. 2
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