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Anvisha [2.4K]
3 years ago
12

At the start of the week a bookshop had science and art books in the ratio 2:5. By the end of the week, 20% of each type of book

s were sold and 2240 books of both types were unsold. How many books of each type were there at the start of the week?
Mathematics
1 answer:
Anastaziya [24]3 years ago
5 0
Let there be 2x science and 5x art books 
<span>science books sold = 2x × 0.2 = 0.4x </span>
<span>science books unsold = 2x – 0.4x = 1.6x </span>

<span>art books sold = 5x × 0.2 = x </span>
<span>art books unsold = 5x – x = 4x </span>

<span>total books unsold = 1.6x + 4x = 5.6x </span>
<span>5.6x = 2240 </span>
<span>x = 400 </span>

<span>2x science = 800 </span>
<span>and 5x art books = 2000 </span>
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Plug in the stuff you know.

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I hope this helps!
~kaikers


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solmaris [256]

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\sqrt {32}

Step-by-step explanation:

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3 years ago
Hotel manager salary and 61,410 which is a 15 increase over the previous year salary what was the previous year salary
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<span>This one is the correct answer----->Multiply the bottom equation by 2 thus eliminating the y variable when the equations are added together.

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3 years ago
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3 years ago
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