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nordsb [41]
3 years ago
5

A sign says that the price marked on all music equitment is 30% off the original price. You buy an electric guitar for the sale

price of $315. What is the original price?
Mathematics
1 answer:
SSSSS [86.1K]3 years ago
5 0

Answer:

$450 is the original price

Step-by-step explanation:

We can create a proportion to find the sale on the original price. A proportion is an equation where two ratios are set equal to each other. We create two fractions using the prices and percents. It is marked down by 30% so we pay 70% of the original. The sale price is $315.

\frac{70}{100} =\frac{315}{x}

We begin solving by cross multiplying numerator to denominator of each fraction.

70(x)=100(315)\\70x=31500\\\frac{70x}{70}=\frac{31500}{70}  \\450=x


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