mm0nroe1 mm0nroe1
  • 23-10-2018
  • Mathematics
contestada

3x+4y=8, 7x-8y=-69 elimination

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OmegaAzzy
OmegaAzzy OmegaAzzy
  • 25-10-2018

The value of x is equal to -4.076

The value of y is equal to 5.057

3x + 4y = 8

7x - 8y = -69

To make this easier, we can multiply each term in the first equation by 2.

6x + 8y = 16

Now, we can use elimination to isolate one variable.

Combine equations.

13x = -53

Divide both sides by 13.

x = -4.076

We can plug this value of x into the equation to find the value of y.

3(-4.076) + 4y = 8

-12.228 + 4y = 8

Add 12.228 to both sides.

4y = 20.228

Divide both sides by 4.

y = 5.057





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