Solve the system by addition. x + y = 4 x - y = 4?

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Solve the system by addition. x + y = 4 x - y = 4?

2007-09-13 08:05:16 · 3 answers · asked by tamdayash 1 in Science & Mathematics ➔ Mathematics

3 answers

x + y = 4
x - y = 4
2x = 8
x = 4
4+y = 4
y = 0

2007-09-13 08:12:23 · answer #1 · answered by ironduke8159 7 · 0⤊ 0⤋

Well, seeing how both equals 4,
x + y = x - y

Subtract x from both sides, you get y = -y.

And the only possible answer here is y = 0 because -0 is 0 lol.

Which means if you plug in 0 for y, you get x = 4.

(4,0)

2007-09-13 15:28:01 · answer #2 · answered by Anonymous · 0⤊ 0⤋

cood it be any more simpler

2007-09-13 15:13:05 · answer #3 · answered by unknown_soul1 4 · 0⤊ 2⤋