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ioda
3 years ago
12

A textbook store sold a combined total of 444 chemistry and biology textbooks in a week. The number of chemistry textbooks sold

was three times the number of biology textbooks sold. How many textbooks of each type were sold?
Mathematics
1 answer:
Arturiano [62]3 years ago
6 0

Answer: 333 chemistry books and 111 biology textbooks

Step-by-step explanation:

444=x+y

x=3y

4y=444

y=111

x=chemistry

y=biology

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<h3>1. t=10</h3><h3>2. t=4</h3><h3>3. t=40</h3>

Step-by-step explanation:

Isolate the term of t from one side of the equation.

<h3>1. 4t=40</h3>

First, you have to divide by 4 from both sides.

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Solve.

Divide the numbers from left to right.

40/4=10

<h3><u>t=10</u></h3>

<h3>2. 10+t=14</h3>

<u>First, change sides.</u>

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<h3>3. 70-t=30</h3>

First, subtract by 70 from both sides.

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<u>Rewrite the problem down.</u>

-t=-40

Divide by -1 from both sides.

-t/-1=-40/-1

<u>Solve.</u>

<u />

<u>Divide the numbers from left to right.</u>

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<h3><u>t=40</u></h3>

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I hope this helps! Let me know if you have any questions.

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2 years ago
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