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Marysya12 [62]
2 years ago
5

Where do 2x - y = 4 and 4x + y = 9 intersect?

Mathematics
1 answer:
Misha Larkins [42]2 years ago
5 0

Answer: They intersect at (2\frac{1}{6}, \frac{1}{3} )

Step-by-step explanation:

We can solve this system of equations through elimination

Add (4x+y=9) with (2x-y=4)

4x+y=9\\+2x-y=4\\=\\6x+0=13

Now that y is canceled out we can solve for x

6x=13\\\frac{6x}{6}=\frac{13}{6}  \\x=2\frac{1}{6}

Now sub back x into one of the original equations to find the value of y

4(2\frac{1}{6} )+y=9\\8\frac{2}{3} +y=9\\8\frac{2}{3}-8\frac{2}{3}+y=9-8\frac{2}{3}\\y=\frac{1}{3}

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