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SVETLANKA909090 [29]
3 years ago
13

twice a number plus three times another number equals 4. three times the first number plus four times the other number is 7. wha

t are the numbers?
Mathematics
1 answer:
Drupady [299]3 years ago
5 0

Answer:

x=5, y=-2. (5, -2).

Step-by-step explanation:

2x+3y=4

3x+4y=7

----------------

3(2x+3y)=3(4)

-2(3x+4y)=-2(7)

----------------------

6x+9y=12

-6x-8y=-14

-----------------

y=-2

2x+3(-2)=4

2x-6=4

2x=4+6

2x=10

x=10/2

x=5

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Answer:

Below in bold.

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3 years ago
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With these, always write out the multiples first.

Start like this:
(assume one of the factors is negative)
1 and 1120
2 and 560
4 and 280
5 and 224
7 and 160
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3 years ago
3. Determine the slope of the line that has the following coordinates: (-3, 6) (4,-2)
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Answer:

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Plug in these values:

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Simplify the parentheses.

= (-2 - 6) / (4 + 3)

= -8 / 7

Simplify the fraction.

= -8/7

This is your slope.

Hope this helps!

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