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mrs_skeptik [129]
3 years ago
11

Twice a number plus three times a second number is twenty two. Three times the first number plus four times the second is thirty

one. Find the numbers
Mathematics
2 answers:
Kay [80]3 years ago
7 0
2x+3y=22
3x+4y=31

8x+12y=88
-9x-12y=-93
x=5
y=4

5 and 4.
Helga [31]3 years ago
7 0

Answer:

<h3>The numbers are 5 and 4</h3>

Step-by-step explanation:

Let the first number be x

Let the second number be y

For the first equation

2x + 3y = 22

For the second equation

3x + 4y = 31

Multiply the first one by 3 and the second one by 2

That's

First equation

6x + 9y = 66

Second equation

6x + 8y = 62

Subtract the second equation from the first one

That's

6x - 6x + 9y - 8y = 66 - 62

<h3>y = 4</h3>

Substitute y = 4 into 2x + 3y = 22

That's

2x + 3(4) = 22

2x = 22 - 12

2x = 10

Divide both sides by 2

<h3>x = 5</h3>

Hope this helps you

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ryzh [129]

Since, the fundraiser only have three prices for books($2, $5 and $10), the number of $5 book that was sold is 12.

<h3>How to form equation and solve ?</h3>

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