x + y = 6, x - y = -2
2007-08-12 14:45:15 · 6 answers · asked by jusjay30 1 in Education & Reference ➔ Homework Help
x=2, y=4
2007-08-12 14:52:11 · answer #1 · answered by Katie 1 · 0⤊ 0⤋
This is a very easy system to solve since you have a positive and a negative of the same variable. They will cancel each other out by addition.
x + y =6
x - y = -2
-------------
2x = 4
x = 2
Now to find y substitute the 2 for x and solve for y.
x + y = 6
2 + y = 6
y = 4
Check by substituting the value for each variable in both equations and you get the correct answers.
2007-08-12 21:52:14 · answer #2 · answered by dpirsq2 5 · 0⤊ 0⤋
I have done one for you, just getting the answers won't help you learn
what you have to is get a formula for x or y = and then substitute it into the second equation so
x = 6 - y
Edit - too late lol!
2007-08-12 21:51:19 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Add them
x+y=6
x-y=-2
2x =4
x =2
Substitute in first equation
2+y=6
y=4
2007-08-12 21:47:20 · answer #4 · answered by ignoramus 7 · 0⤊ 0⤋
x=2 y=4
its subsitution
2007-08-12 21:50:48 · answer #5 · answered by Anonymous · 0⤊ 0⤋
y = 6- x
x - (6-x) = -2
x = 2
y = 4
2007-08-12 21:49:05 · answer #6 · answered by Krystle K 1 · 0⤊ 0⤋