The equation that represents the algebra tiles is
x - 4 = 9
The value of the equation is 13.
What is algebra tiles?
From the information provided
The red squares on the left are four and have negative sign, which means (- 4)
The vertical rectangle represents variable x and it has positive sign
i.e (+ x)
The vertical line represents (=) sign
The nine yellow squares represents (+9) since it is positive
Let combine the terms to form an equation
-4 + x = +9
Or
x - 4 = 9
This equation can be simplified
x = 9 + 4
x = 13
The value of the equation is 13.