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Algebra Difficulty 3.9 AMC 10/12 Find the answer South Africa
If a∙b means the value of ab+a+b, and 5∙x=35, the value of x must be
Pick one
Solution
By definition of ∙, we know 5∙x=5x+5+x=6x+5. If this is 35, then 6x=30, so x=5
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