Bonus Math Problem (rational Expresions)?

2 ⤊

-x-y=8
2x-y=-1
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?

2007-05-27 07:03:45 · 4 answers · asked by pup 4 in Education & Reference ➔ Homework Help

-x-y=8
2x-y=-1

-x-y+y=8+y
-x=8+y
-1(-x)=-1(8+y)
x=-8-y

2(-8-y)-y=-1
-16-2y-y=-1
-3y-16+16=-1+16
-3y=15
-3y/-3=15/-3
y=-5

-x(-5)=-8
x=-3

2007-05-27 09:59:13 · answer #1 · answered by Dave aka Spider Monkey 7 · 1⤊ 0⤋

x= - 3 y=- 5

2007-05-27 14:30:10 · answer #2 · answered by Anonymous · 0⤊ 0⤋

subtracting the equations
-3x = 9
x = -3

put x =-3 in any equation and u will get y= -5

2007-05-27 14:08:49 · answer #3 · answered by macline k 2 · 0⤊ 0⤋

-y=8+x
y=-8-x
2x+8+x=-1
3x+8=-1
3x=-9
x=-3

2007-05-27 14:13:51 · answer #4 · answered by ????? 7 · 1⤊ 0⤋