Question

which equation represents the model?
4x = 36
4(x + 6) = 36
x + 6 = 36
4x + 6 = 36
chart: four rectangles labeled x+6 each, total length 36

Explanation:

Step1: Count the number of segments

There are 4 segments labeled $x + 6$.

Step2: Sum the segments

Total length = $4 \times (x + 6) = 36$.

Answer:

$4(x + 6) = 36$