Question

Solve the following system.
x - y = 10
x + y = 8
Answer

(9, -1)

(9, 1)

(-1, 9)

(-9, 1)

Answer 1

Okay this is how u solve systems. First solve one equation for one variable.

Answer 2

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?

Answer 3

x = y + 10

Answer 4

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?

Answer 5

2y+10=8

Answer 6

correct. Subtract ten from both sides. What do u get?

Answer 7

y = -1

Answer 8

awesome. Now plug that back into the equation you had before.

Answer 9

x + -1 = 8
x = 9
danks schun!

Answer 10

Yup. Your points are given in the form (x; y). Find whichever's yours.

Answer 11

good job lol.

Answer 12

lol