Solution
Given the question in the image, the following are the solution steps to answer the question.
STEP 1: Explain the model
It can be seen from the image that the longer block is made up of two short blocks. Since the short block is 1, the longer one will be two times the short block which is 2 times 1 = 2.
STEP 2: Get the value of x
[tex]\begin{gathered} x=1\times2=2 \\ So\text{ we have:} \\ 2,2,1=2+2+1=5 \end{gathered}[/tex]
Hence, the value of x that makes the equation true is:
[tex]x=2[/tex]
