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3 years ago

:3 Help in math, please? I will give you a cookie.

Mathematics

1 answer:

den301095 [7]3 years ago

4 0

Y=5-3x
5x-4y=-3

y=5-3x
-4y=-3-5x
----------------
-3y=2-7x

-3(y)=2-7(x)
u can try plugging in any number for y

-3(3)=2-7x
9=2-7x
-2 -2
7=7x
-- --
7 7
1=x

so 3,1

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Answer:

The answer is 40

Step-by-step explanation:

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4*2.5=10

So 30+10=40

Hope this helps!!

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3 years ago

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rodikova [14]

Answer:

The solution of this system of linear equations is $(x,y) = (-3,-2)$ .

Step-by-step explanation:

Let be the following system of linear equations:

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$-3\cdot x + 2\cdot y = 5$ (2)

From (1) we clear $y$ :

$2\cdot x -8 = 7\cdot y$

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And we apply this variable in (2):

$-3\cdot x+2\cdot \left(\frac{2\cdot x -8}{7} \right)= 5$

$-3\cdot x +\frac{4}{7} \cdot x -\frac{16}{7} = 5$

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$x = -\frac{51}{17}$

$x = -3$

And the value of $y$ is:

$y = \frac{2\cdot (-3)-8}{7}$

$y = -\frac{14}{7}$

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