This is order of operations, not distributive property. There is no variable to apply to the equation. Could he written it better? Yes. But(to my knowledge of math) his intentions were the answer nine.
English
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It still could be one. So that means that with they way he had wrote it that he it could be both 1 and 9
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No. 6/2(2+1) 6/2(3) 3(3) 9
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Or 6÷2 (1+2) 2×1+2×2 6÷6 1