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4 years ago

−4x+7y=3 solve for x and y

Mathematics

1 answer:

kap26 [50]4 years ago

3 0

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

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

Sorry if this is wrong!

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WILL GIVE BRAINLIEST!

Nataly [62]

Answer:

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Step-by-step explanation:

The general form of the circle is

$x^2+y^2+Dx+Ey+F=0\hfill (1)$

Given points are (5,0) , (0,4) and (2,4)

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Substituting the point (5,0) in (1)

$(-5)^2+(0)^2+D(5)+E(0)+F=0$

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Substituting the point (0,4) in

$(0)^2+(4)^2+D(0)+E(4)+F=0$

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Substituting the point (2,4) in

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$4+16+2D+4E+F=0$

$2D+4E+F=-20\hfill (4)$

By solving the equations (2) ,(3) and(4) we get the values of D,E and F as below

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substituting the values of D,E and F in (1) we get

$x^2+y^2-2x+(0)y-15=0$

Now multiplying the above equation into 4 we get

$4x^2+4y^2-8x+(0)y-60=0$

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