Solve the system?

2 ⤊

x + y = 7
x - y = 9

2006-11-20 01:14:17 · 3 answers · asked by wck_b 1 in Education & Reference ➔ Homework Help

3 answers

x + y = 7
x - y = 9

Add the two equations:

2x = 16
x = 8

Substitute into either of the equations:

x + y = 7
8 + y = 7
y = -1

or x - y = 9
8 - y = 9
y = -1

2006-11-20 01:22:37 · answer #1 · answered by Doug R 5 · 2⤊ 0⤋

x=8 y=-1

2006-11-20 01:18:39 · answer #2 · answered by George G 5 · 0⤊ 1⤋

x=8
y=-1

2006-11-20 03:02:47 · answer #3 · answered by A knight with a heart & wisdom 2 · 0⤊ 0⤋