To produce an old photograph, a photographer charges x dollars to make a negative 3x/5 dollars for each of the first 10 prints, and x/5 dollars for each print in excess of 10 prints. If 45 dollars is the total charge to make a negative and 20 prints from an old photograph, how many dollars the photographer charges to make a negative?
Created: 6 years ago |
Updated: 1 year ago
best des
To reproduce an old photograph, a photographer charges x dollars to make a negative, 3x/5 dollars for each of the first 10 prints, and x/5 dollars for each print in excess of 10 prints. If $45 is the total charge to make a negative and 20 prints from an old photograph, what is the value of x?
Answer:
a negative charge=x
first 10 prints charge= 10*3x/5=30x/5 = 6x
other 10 prints charge= 10*x/5=10x/5=2x
x+6x+2x = 45
9x = 45
x = 5
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