2007-11-18 09:42:05 · 4 answers · asked by Tonie M 1 in Science & Mathematics ➔ Mathematics
x = 13 + 5y
(-2) (13 + 5y) - 2y = - 2
- 26 - 10y - 2y = - 2
12y = - 24
y = - 2
x = 13 - 10
x = 3
x = 3 , y = - 2
2007-11-22 03:38:50 · answer #1 · answered by Como 7 · 1⤊ 0⤋
Ok, go
(a) x – 5y = 13
(b) –2x – 2y = –2
(a) x - 5y = 13
x = 13 + 5y
-----------------¦
(b) –2x – 2y = –2....... ---------> " x = 13 + 5y " <--------
-2(13 + 5y) -2y = -2
-26 -10y -2y = -2
-26 +2 = 10y + 2y
-24 = 12 y
y = -24 / 12
y = -2
-----------¦
(a) x - 5y = 13 ........----------> " y = -2 " <---------
x - 5( -2) = 13
x + 10 = 13
x = 13 - 10
x = 3
--------¦
____________________________________________
Now, try ....... " x " and " y "
(a) 3 – 5 (-2) = 13
(a) 3 + 10 = 13
(a) 13 = 13
-----------------¦ .........it GoOd!
(b) –2( 3) – 2 (-2) = –2
(b) -6 + 4 = -2
(b) -2 = -2 .........it GoOd!
---------------¦
Bye-bye
2007-11-18 18:33:05 · answer #2 · answered by ƒέ 4 · 0⤊ 1⤋
X=3
Y=-2
2007-11-18 17:47:44 · answer #3 · answered by Sandy 4 · 0⤊ 0⤋
x-5y=13
-2x-2y=-2
x=5y+13
-2(5y+13)-2y=-2
-10y-26-2y=-2
-12y-26=-2
-12y=24
y=-2
x-5(-2)=13
x+10=13
x=3
2007-11-18 18:09:57 · answer #4 · answered by Dave aka Spider Monkey 7 · 0⤊ 1⤋