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Solve the following system. x - y = 10 x + y = 8 Answer (9, -1) (9, 1) (-1, 9) (-9, 1)

Mathematics
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Okay this is how u solve systems. First solve one equation for one variable.
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?
x = y + 10

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Other answers:

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

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