2007-01-08 04:28:51 · 11 answers · asked by F O 1 in Science & Mathematics ➔ Mathematics
x +3y =12
x=y
4y= 12
y=3=x
2007-01-08 04:30:50 · answer #1 · answered by Patrick M 2 · 0⤊ 0⤋
3
2007-01-08 12:36:12 · answer #2 · answered by Anonymous · 0⤊ 0⤋
x=3=y
2007-01-11 09:04:04 · answer #3 · answered by manka k 1 · 0⤊ 0⤋
If x=y then x+3x=12
So 4x=12
x=3
y=3
2007-01-08 12:46:58 · answer #4 · answered by brainyandy 6 · 0⤊ 0⤋
x=y
x+3y=12 substitute from above
y+3y=12 combine like terms
4y=12 divide both sides by 4
y=3 substitute in 1st equation
x=y=3
(3, 3)
2007-01-08 13:20:41 · answer #5 · answered by yupchagee 7 · 0⤊ 0⤋
x=3
3+3*3=12
2007-01-08 12:30:54 · answer #6 · answered by Anonymous · 0⤊ 0⤋
x=y x+3y=12?
Answer
12*y = 3 + x
12*4 = 3 + x
12*4 = 3 + 8
x = 8
y = 4
8 x 4 = 12
2007-01-08 13:19:35 · answer #7 · answered by Anonymous · 0⤊ 0⤋
x=y then x and y must equal 3.
3(x) + 3*3 (3y) =12
3 + 9 = 12
2007-01-08 12:33:58 · answer #8 · answered by kaleidoscope_girl 5 · 0⤊ 0⤋
As I said before
If x=y and x+3y=12
x+3x=12
Therefore 4x=12
and x=3
2007-01-08 12:35:39 · answer #9 · answered by BARROWMAN 6 · 0⤊ 0⤋
x = y
x + 3y = 12
x + 3x = 12
4x = 12
x = 3
y = x = 3
2007-01-08 12:31:40 · answer #10 · answered by Tom :: Athier than Thou 6 · 0⤊ 0⤋