2007-09-04 16:28:14 · 5 answers · asked by Anonymous in Education & Reference ➔ Homework Help
X is 2
Y is 1
plug those in, and you get 7.
2007-09-04 16:35:28 · answer #1 · answered by Anonymous · 0⤊ 0⤋
start with original equation you were given:
3x+y=7
subtract 3 x from each side:
y=7-3x
you have solved for y, because it is ALONE on one side of the equation. To get a numerical value for y you would need to know the value of x and substitute in the equation. If for example x=2, then substituting in the solved equation:
y=7-3(2) or 7-6
in this example, y=1
other answers would be correct depending only on what x is actually valued at
2007-09-04 23:38:35 · answer #2 · answered by Mike 7 · 0⤊ 0⤋
You need to subtract 3x from both sides of the equality.
==> -3x + 3x +y = -3x +7
==> y = -3x +7
2007-09-04 23:35:02 · answer #3 · answered by Mark S 4 · 0⤊ 0⤋
You want to isolate y on one side of the equation. To get y by itself, subtract 3x from both sides. So you get
y= 7 - 3x
2007-09-04 23:35:00 · answer #4 · answered by Daisy J 3 · 0⤊ 0⤋
To find y, you have to shift everything which does not have the unknown " y " to one side.
3x + y = 7
Therefore, y =
y = 7 - 3x
That's your answer. You can't solve it because you have two unknowns.
Hope it helps. xD
2007-09-04 23:35:46 · answer #5 · answered by Chemgurl 2 · 0⤊ 0⤋