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vesna_86 [32]
3 years ago
10

Carla is a US student. She is purchasing used textbooks, because she is balling on a budget (pro tip: don't ever buy new books)!

She purchased a math book and a reading book, and the total was $54. The price of the math book is $8 more than 3 times the cost of the reading book. What is the cost of each book?

Mathematics
1 answer:
k0ka [10]3 years ago
4 0
I think this is how you do it. Use x as the price of the reading book, then make it an equation. Let me know if you don’t understand any of the steps. Hope that helps!

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-2 -13.8x = -8 -(6x+1)
Varvara68 [4.7K]
-2 -13.8x = -8 -6x -1
First, I distributed the negative 1 that was outside of the parentheses to the positive 6x and the positive 1.

-2 -13.8x = -9 -6x
Then I added the negative 8 to the negative 1 which equals negative 9.

-2 -13.8x +6x = -9 -6x +6x
After that I used the addition property and added a positive 6x to both sides.

-2 -7.8x = -9
Then simplifying.

+2 -2 -7.8x = -9 +2
After simplifying, I used the addition property again, adding a positive 2 to both sides.

-7.8x = -7
Simplified.

-7.8x (-1) = -7 (-1)
Then I multiplied both sides by with a negative 1 since the variable cannot be a negative.

7.8x = 7
Simplified

(1/7.8) 7.8x = (1/7.8) 7
Then, to isolate the veriable, I multiplied 1/7.8 to both sides.

x = 1.11428571429
The answer !

I hope this helped !
7 0
3 years ago
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Gemiola [76]
Hi you can change the scientific notation to standard notation. Then go from there
3 0
2 years ago
12 + 6x -18 <br> Helpppp!!
Eddi Din [679]

Answer:

6x - 6

Step-by-step explanation:

<em>The only step necessary here is to simplify. We can subtract 18 from 12 since they are like terms. </em>

6x - 6.

<em>That's it! That's your final answer. </em>

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Rus_ich [418]

Answer:

1

Step-by-step explanation:

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Let x = -6

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1

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Answer:

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Step-by-step explanation:

8 0
3 years ago
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