单项选择题
For senior class pictures, a photographer charges x dollars to make a negative,
dollars for each of the first 20 prints, and
dollars for each print in excess of 20 prints. If $80 is the total charge to make a negative and 30 prints, what is the value of x
(A) 3
(B) 4
(C) 5
(D) 6
(E) 7
(B) 4
(C) 5
(D) 6
(E) 7
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