Question

Modeling an Equation

Use the algebra tiles to model the equation
2x + 4 = 3x + (−1). Then complete the sentences.

To model 2x + 4, you need:


positive x-tiles to represent 2x.

positive unit tiles to represent 4.

To model 3x + (−1) you’ll need:

3
x-tiles to represent 3x.
1
unit tile to represent –1.

Answer 1

2 4

✔ positive

✔ negative

Explanation:

Answer 2

Yes all your used tiles are correct.

Let's solve the equation too

• 2x+4=3x+(-1)
• 2x+4=3x-1
• 4+1=3x-2x
• x=5