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A math problem in senior high school (judging the adequacy of conditions)
Both conditions are empty sets. When x is 5/3, the left side of the equation is equal to -3, but not equal to the right side, so it is enough that there is no value of x that meets the conditions. When two thirds

-6x+7, ordering

-6x+7=3 has X=2/3, so when condition 2 gives 7/6,