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Chapter 3: Q.74 (page 113)

Stamps Paula bought $22.82 worth of 49-cent

stamps and 21-cent stamps. The number of 21-cent

stamps was eight less than the number of

49-cent stamps. Solve the equation

0.49s + 0.21(s − 8) = 22.82 for s, to find the number

of 49-cent stamps Paula bought.

Short Answer

Expert verified

The number of 49-cent stamps are 35.

Step by step solution

01

- The given information

0.49s+0.21(s−8)=22.82

02

Step 2

0.49s+0.21(s−8)=22.82⇒0.49s+0.21s−1.68)=22.82⇒0.70s=22.82+1.68⇒0.70s=24.5⇒s=35

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