2007-12-11 02:25:51 · 5 answers · asked by thonia 1 in Science & Mathematics ➔ Mathematics
2x + 4y = 2
- 2x + 5y = 16------ADD
9y = 18
y = 2
x + 4 = 1
x = - 3
x = - 3 , y = 2
2007-12-11 02:31:22 · answer #1 · answered by Como 7 · 2⤊ 0⤋
x+2y=1
x=1-2y ===> (1)
-2x+5y=16 ===>(2)
Substitute 1 in 2
-2(1-2y) +5y=16
-2+4y+5y=16
9y=18
y=2
now put x is in equation (1)
x=1-2y
x=1-2(2)
x=-3
Y-coordinate is 2
X-coordinate is -3
2007-12-11 10:31:17 · answer #2 · answered by Murtaza 6 · 1⤊ 0⤋
x+2y=1
-2x+5y=16
Take the first equation and multiply it by 2:
2x+4y=2
-2x+5y=16
=========
9y=18
y=2
x+2(2)=1
x+4=1
x=-3
2007-12-11 10:53:19 · answer #3 · answered by Anonymous · 0⤊ 1⤋
x+2y=1 --- Multiply this by 2
2x+4y=2
-2x+5y=16 add them together
----------------
9y = 18
y = 2
2007-12-11 10:30:39 · answer #4 · answered by Anonymous · 1⤊ 0⤋
Multiply first equation by 2:Â Â
 x + 2y = 1
Add it to second equation:
 2x + 4y + 2
-2x + 5y = 16
-----------------
9y = 18
Solve for y:
y = 2
2007-12-11 10:33:19 · answer #5 · answered by DWRead 7 · 1⤊ 1⤋