Substitute: \( 2(3w + w) = 96 \)
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- A rectangle has a length that is 3 times its width. If the perimeter is 96 meters, what is the width?
- Perimeter formula: \( 2(l + w) = 96 \)
- Simplify: \( 2(4w) = 96 \) → \( 8w = 96 \)
- Divide by 8: \( w = 12 \)
- A chemist mixes 5 liters of a 20% acid solution with 3 liters of a 60% acid solution. What is the concentration of the resulting mixture?
