Answer:
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Step-by-step explanation:
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Answer:
The original price of the book was $12.50
Step-by-step explanation:
3x - 0.2(3x) + 10 = 40
30x - 2(3x) + 100 = 400
30x - 6x + 100 = 400
24x + 100 = 400
24x = 300
x = 12.50
How generous
x+3=8
minus 3 both sides
x+3-3=8-3
x+0=5
x=5