His model is incorrect because 20 x 7 is not 14, it is 140. If he had 140 instead of 14, he would have been correct.
I haven't done division like that in a long time, so this is what I think it will look like. I didn't add other work (multiplying 4 with #'s) but you can if you have to
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thought this was a joke, but 24 inches is 2 feet sir or madam
Step-by-step explanation:
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I don't know if I'm doing this 100% correctly but I would put:
four plus nine's total multiplied by 3
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It has one solution which is a=1