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podryga [215]
3 years ago
6

58 of 40

Advanced Placement (AP)
1 answer:
andre [41]3 years ago
5 0

Answer: 6

Explanation:

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X-y=16 7x+2y=13 solving system of Equations by substitution
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Answer:

The answer is "x= -\frac{19}{5} \ and \ y= - \frac{99}{5}"

Explanation:

\to x-y=16..........(a) \\\\ \to 7x+2y=13.........(b)\\

In equation (a) multiply by 2 then subtract from the equation (b):

7x+2y=13\\\\2x-2y=32\\\\- \  -\ =  -\ \\\\5x = -19 \\\\x= -\frac{19}{5}

put the value of x in equation (a):

-\frac{19}{5} -y=16\\\\ -y=16 +\frac{19}{5}\\\\-y=  \frac{80+19}{5}\\\\y= -\frac{99}{5}

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