To solve the hanger model you've described, we need to set up an equation based on the information provided regarding the left side and the right side.
From your description, it seems like there is a left side with a weight represented as "r + 4" and a right side that equals 14. Therefore, the equation should reflect that the total on the left equals the total on the right.
Assuming "left r r 4" means that on the left you have two "r" weights plus 4, we can express this as:
\[ 2r + 4 = 14 \]
So the appropriate equation you've listed to represent your hanger model is:
\(2r + 4 = 14\)
If you would like to solve for \(r\), you can follow these steps:
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Subtract 4 from both sides: \[ 2r = 14 - 4 \ 2r = 10 \]
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Divide both sides by 2: \[ r = \frac{10}{2} \ r = 5 \]
Thus, \(r = 5\) is your solution.