anonymous
  • anonymous
Solve the following system. x - y = 10 x + y = 8 Answer (9, -1) (9, 1) (-1, 9) (-9, 1)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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bahrom7893
  • bahrom7893
Okay this is how u solve systems. First solve one equation for one variable.
bahrom7893
  • bahrom7893
So solve the first equation for x, or y, doesn't matter. Let's solve for x: x-y=10 Add y to both sides. What do u get?
anonymous
  • anonymous
x = y + 10

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bahrom7893
  • bahrom7893
Correct. Now plug that into the second equation: x + y = 8, but now that u know x, plug that instead of x in here. What do u get?
anonymous
  • anonymous
2y+10=8
bahrom7893
  • bahrom7893
correct. Subtract ten from both sides. What do u get?
anonymous
  • anonymous
y = -1
bahrom7893
  • bahrom7893
awesome. Now plug that back into the equation you had before.
anonymous
  • anonymous
x + -1 = 8 x = 9 danks schun!
bahrom7893
  • bahrom7893
Yup. Your points are given in the form (x; y). Find whichever's yours.
bahrom7893
  • bahrom7893
good job lol.
anonymous
  • anonymous
lol

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