Answer :
Set the numbers as equivalent fractions :
[tex] \frac{350}{x} = \frac{7}{10} [/tex] (30% off means 70% of the original price)
Cross multiply: 3500=7x
Solve for x: x = \frac{3500}{7} [/tex] , or x=500
[tex] \frac{350}{x} = \frac{7}{10} [/tex] (30% off means 70% of the original price)
Cross multiply: 3500=7x
Solve for x: x = \frac{3500}{7} [/tex] , or x=500