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Sally is buying new school supplies. She used a 15% off coupon on a set of markers that was originally \$3.00. She also bought some paper that was 20% off. In total, Sally spent \$5.35 after using her coupons. How much was the original price of the paper?

Jan 30, 2019

#1
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\$3 x 0.85 = \$2.55 - cost of markers.

Let the original price of paper =P

\$2.55 + 0.80P = \$5.35

0.80P = \$5.35 - \$2.55

0.80P =\$2.80

P = \$2.80 / 0.80

P = \$3.50 - Original price of paper.

Jan 30, 2019
#2
+1

Sally is buying new school supplies. She used a 15% off coupon on a set of markers that was originally \$3.00. She also bought some paper that was 20% off. In total, Sally spent \$5.35 after using her coupons. How much was the original price of the paper?

Price she paid for the markers with coupon =   3.00 x .85  = \$2.55

Price of paper = P

Price of paper with coupon = .80P

So

2.55 + .80P =  5.35      subtract 2.55 from both sides

.80P = 2.80      divide both sides by .80

P =  2.80 / .80  = \$3.50  = original price of the paper   Jan 30, 2019