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Semenov [28]
3 years ago
15

X+y =78310x+7y=6459​

Mathematics
1 answer:
laiz [17]3 years ago
5 0

9514 1404 393

Answer:

  (x, y) = (326, 457)

Step-by-step explanation:

Use the first equation to make an expression for y that can be substituted into the second.

  y = 783 -x

  10x +7(783 -x) = 6459

  3x = 978 . . . . . . . . . . . . subtract 7(783) = 5481

  x = 326 . . . . . . . . . . . . . divide by 3

  y = 783 -326 = 457

The solution is (x, y) = (326, 457).

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Rearrange x=3g+2 to make g the subject
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Simplify the expression:<br> 1x+10y=4+3
igomit [66]

Answer:

Simplify the expression:

1x+10y=4+3

Step-by-step explanation:

1 : x+10y=4+3

x+10y=4+3

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3 0
3 years ago
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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>

The fundraiser only have 3 prices for books which are $2, $5 and $10.

There were 6 more $5 books sold than $10 books sold.

Let

x = number of $10 book sold

Therefore,

number of  $5 books sold = x + 6

There are 8 more $2 book sold than $10 book sold. Therefore,

number of  $2 books sold = x + 8

A total of $250 was raised.

Therefore, the total amount sold forms the following equation:

10x + 5(x + 6) + 2(x + 8) = 250

10x + 5x + 30 + 2x + 16 = 250

17x = 250 - 30 - 16

17x  = 204

x = 204 / 17

x = 12

learn more on equation here: brainly.com/question/27361014

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2 years ago
What is the volume?.<br> 2 mm<br> 9 mm
NeTakaya

Answer:

Step-by-step explanation:

Please check your question

6 0
3 years ago
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