Mathematics: 8x-5y=15 6x+4y=43solve the system by any method

It should be C because it s a working function...

8x-5y=15 6x+4y=43solve the system by any method

coollid876

20.12.2021

$x=\frac{275}{62}$ , $y=\frac{127}{31}$

Step-by-step explanation:

I will use the elimination method.

We want to make the X's the same:

24x-15y=45

24x+16y=172

Because the signs of the X's are the same we subtract the 2 equations to make:

(I put the second one on top of the 1st)

31y=127

So:

$y=\frac{127}{31}$

Substitute y into either equation 1 or 2:

(I chose equation 1)

$8x-5(\frac{127}{31})=15$

$8x=5(\frac{127}{31}) + 15$

$x=\frac{5(\frac{127}{31})}{8}$

So:

$x=\frac{275}{62}$

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