x + y = 12
y = 2x =
2006-09-24 10:57:05 · 5 answers · asked by Rolando C 1 in Education & Reference ➔ Homework Help
I'm going to assume that the second equasion should read y=2x
Solve for y in the first equasion:
x=12-y
Then fill it in the second:
y=2(12-y)
Distribute:
y=24-2y
Add 2y to both sides:
3y=24
Divide both sides by 3:
y=8.
Now, put the value for "y" in the first equasion.
x+8=12.
Subtract 8 from both sides.
x=4.
So x=4 while y=8. :)
2006-09-24 11:01:47 · answer #1 · answered by killingwish 4 · 0⤊ 0⤋
x+2x=12
3x=12
x=4
2006-09-24 17:59:21 · answer #2 · answered by russianguyfrombrooklyn 2 · 0⤊ 0⤋
D192 has the correct answer. When the question asks to "solve the system" that means to answer with an ordered pair.
2006-09-24 18:20:03 · answer #3 · answered by kristin 2 · 0⤊ 0⤋
x + y = 12
y = 2x
So x + 2x = 12
So 3x = 12
x=4 y=8
2006-09-24 18:01:22 · answer #4 · answered by migdalski 7 · 0⤊ 0⤋
(4,8)
2006-09-24 18:00:10 · answer #5 · answered by D192 2 · 0⤊ 0⤋