x + 2y = 8
2007-09-14 10:40:45 · 10 answers · asked by antwon 1 in Science & Mathematics ➔ Mathematics
x + 2y = 8 subtract x from both sides
2y=8 - x divide both sides by 2
y = 4 - ½x
If you do the same thing to both sides of the equal
sign, equality is preserved or any other relation is preserved.
2007-09-14 10:52:51 · answer #1 · answered by ? 5 · 0⤊ 0⤋
Always remember to isolate the variable you are solving for. You want to have that variable, Y in this case, alone on one side of the equals mark.
first, subtract x from both sides (the x's on the left cancel out)
-x +x +2y = 8 -x
leaves you with 2Y=8-X
now, divide both sides by 2
2y/2= (8-x)/2
Y=4-1/2x
You can't get an actual answer in this case, because several values will work to make the statement true.
2007-09-14 10:52:05 · answer #2 · answered by mawwelch 2 · 0⤊ 0⤋
Isolate the y term. First, subtract x from both sides: 2y = 8 - x. Then, divide both sides by 2: y = (8 - x)/2, and that is your answer. The other answerers are correct, namely, that you will not get an actual number. I hope this helps!
2007-09-14 10:54:22 · answer #3 · answered by Gee Wye 6 · 0⤊ 1⤋
X + 2Y =8
2y = 8 - x
y = (8-x)/2
2007-09-14 10:44:43 · answer #4 · answered by ANNAGINA M 2 · 1⤊ 1⤋
x+2y = 8
2y =8 - x
y=(8 -x)/2
2007-09-14 10:54:17 · answer #5 · answered by allwell 2 · 0⤊ 1⤋
x+2y=8
2y=8-x
y=4-(x/2)
2007-09-14 10:45:57 · answer #6 · answered by Andrew M 2 · 0⤊ 0⤋
2 y = 8 - x
y = 4 - ( x / 2 )
2007-09-15 03:39:21 · answer #7 · answered by Como 7 · 2⤊ 0⤋
Sorry but you wont get the actual number! but the answer is:
y=(8-x)/2
2007-09-14 10:49:03 · answer #8 · answered by iHeartChem 2 · 1⤊ 0⤋
Actual Number!!
x=100 and y= -46
100 + 2 (-46)=
100 - 92 = 8
y= -46
:-)
..
2007-09-14 10:49:20 · answer #9 · answered by muddypuppyuk 5 · 0⤊ 0⤋
(8-x) / 2 = y
you wont get an actual number
2007-09-14 10:44:55 · answer #10 · answered by Rebel Babe 3 · 1⤊ 0⤋