2007-06-10 05:51:32 · 6 answers · asked by lindasalicea 1 in Science & Mathematics ➔ Mathematics
2x-y=1 so 2x-1=y
Substituting:
6(2x-1) - 2x = 9
12x - 6 - 2x = 9
12x -2x = 9 + 6
10x = 15
x = 15/10 = 3/2
y= 2x-1 = 2(3/2) - 1 = 6/2 - 1 = 2
2007-06-10 05:55:35 · answer #1 · answered by whitesox09 7 · 0⤊ 0⤋
2x-y=1
6y-2x=1
Change the first equation to the form of "y="
2x-y+y=1+y
2x=1+y
2x-1=1-1+y
2x-1=y
Now, substitute that equation into the second equation for y:
6(2x-1)-2x=9
12x-6-2x=9
10x-6=9
10x-6+6=9+6
10x=15
x=15/10=3/2=1 1/2
Substitute the value of x into the two equations to solve for y:
2(3/2)-y=1
3-y=1
3-3-y=1-3
-y=-2
y=2
6y-2(3/2)=9
6y-3=9
6y-3+3=9+3
6y=12
y=2 (confirms the result of the first equation)
2007-06-10 13:01:26 · answer #2 · answered by teknomancer73 4 · 0⤊ 0⤋
2x-y=1 ----(1)
-2x+6y=9 ----(2)
(1)+(2): 5y = 10 => y=2
Sub y=2 into (1): 2x-2=1 => 2x=3 => x=3/2=1.5
x=1.5, y=2
2007-06-10 12:55:48 · answer #3 · answered by Kemmy 6 · 0⤊ 0⤋
2x - y =1
6y - 2x = 9
y = 2x - 1
6(2x - 1 ) - 2x = 9
y = 2x -1
12x - 6 -2x = 9
y = 2x -1
10 x = 15
y = 2x - 1
x = 15 / 10 = 3 / 2
y = 2 ( 3/2) - 1 = 2
x = 3/2
y=2
2007-06-10 12:58:29 · answer #4 · answered by Dr.A 7 · 0⤊ 0⤋
2x - y = 1
- 2x + 6y = 9-----ADD
5y = 10
y = 2
2x - 2 = 1
2x = 3
x = 3/2
SOLUTION is x = 3/2 , y = 2
2007-06-10 13:32:23 · answer #5 · answered by Como 7 · 0⤊ 0⤋
do your own homework
2007-06-10 12:55:34 · answer #6 · answered by Anonymous · 1⤊ 1⤋