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SVETLANKA909090 [29]
3 years ago
15

If 2/5 of a number is added to 1/3 of the same number ,the sum is 22. What is the number?

Mathematics
2 answers:
exis [7]3 years ago
8 0
From the text of the task we can write the following equation:

\frac{2x}{5}+\frac{x}{3}=22\\
\\
Solving: multiplying \ all \ terms \ by \ 15:\\
\\
6x+5x=330\\
\\
11x=330\\
\\
x=\frac{330}{11}\\
\\
\boxed{x=30}
zubka84 [21]3 years ago
7 0
<u>2/5 x + 1/3 x = 22</u>

First of all, I've been answering so many of these things lately that I'm
getting really tired of 'x'.  Let's call the unknown number ' Q ' instead.

<u>2/5 Q + 1/3 Q = 22</u>

Multiply each side by 5 :

2Q + 5/3 Q = 110

Multiply each side by 3 :

6Q + 5Q = 330

Add the like terms on the left side:

11Q = 330

Divide each side by 11 :

<u>Q = 30</u> .
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see the attached figure to better understand the problem

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3. The math club and the science club had fundraisers to buy supplies for a hospice. The math
kirill115 [55]

Cost of Case of Juice: 20

Cost of Case of Water: 15

What is an equation?

The definition of an equation in algebra is a mathematical statement that demonstrates the equality of two mathematical expressions.

Here, we let

cost of a case of juice = x

cost of a case of water = y

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4x + 2y = 110.....(2)

Now, we multiply equation (1) by 2 and equation (2) by 1 and we get

12x + 2y = 270

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Now, we subtract equation (1) from equation (2) and we get

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Hence, the Cost of a Case of Juice: 20

Cost of Case of Water: 15

To learn more about the equation from the given link

brainly.com/question/25976025

#SPJ1

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1 year ago
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Murljashka [212]

I ain't gonna explain how I got to this cuz I'm quite tired rn but trust me the answer is 2c²

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