2006-12-27 06:38:51 · 28 answers · asked by kim c 1 in Science & Mathematics ➔ Mathematics
3x - 2y=7 x =1
Substituting for x = 1 in your equation, we get
3 * 1 - 2y = 7
3 - 2y = 7
-2y = 7 -3
-2y = 4
-y = 4/2
- y = 2
y = -2
2006-12-27 06:41:00 · answer #1 · answered by pkababa 4 · 2⤊ 0⤋
If x = 1, then 3(1) - 2y = 7 so that rearranging
-2y = 7 - 3 = 4
y = 4/(-2) = -2
2006-12-27 14:41:03 · answer #2 · answered by kellenraid 6 · 2⤊ 0⤋
Put the 1 in for x:
3(1) - 2y = 7
3 - 2y = 7
Subtract 3 from both sides:
-2y = 4
Divide both sides by -2:
y = -2
2006-12-27 14:41:05 · answer #3 · answered by Joy M 7 · 2⤊ 0⤋
you substitute the value for x into the equation. that gives you:
3(1)-2y=7. That gives you:
3-2y=7. You get y alone so you subtract three from both sides.
-2y=4. you divide both sides by -2.
Then you get y=-2
2006-12-27 15:27:00 · answer #4 · answered by blah 4 · 0⤊ 0⤋
3x - 2y = 7
x = 1
Therefore; (3 x 1) - 2y = 7 (by substituting x = 1 into equation)
So; 3 - 2y = 7
2y = -4
y = -2
2006-12-27 15:14:09 · answer #5 · answered by Steve 2 · 1⤊ 0⤋
substitute 1 for x:
3(1) - 2y = 7
3 - 2y = 7
subtract both sides by 3
3 - 3 - 2y = 7 - 3
-2y = 4
Divide both sides by -2
-2y/2 = 4/-2
y = -2
2006-12-27 14:41:51 · answer #6 · answered by jard jard binx 3 · 2⤊ 0⤋
3x-2y=7; x=1
3*1-2y=7
3-2y=7
-2y=4
y=-2
2006-12-27 15:39:04 · answer #7 · answered by yupchagee 7 · 0⤊ 0⤋
3x-2y=7; x=1
3(1)-2y=7
3-2y=7 [subtract 3 from both sides]
-2y=4 [divide both sides by -2]
y=-2
2006-12-27 14:49:05 · answer #8 · answered by Rebekah 2 · 1⤊ 0⤋
SUB X = 1 INTO THE EQUATION
3X - 2Y = 7
3(1) - 2Y = 7
ISOLATE Y
-2Y = 7 - 3 -> -2Y = 4
Y = 4/-2
Y= -2
2006-12-27 14:41:25 · answer #9 · answered by Cu Den 2 · 2⤊ 0⤋
of course y=-2
because:
3*1-2y=7,
-2y=4
y=-2
2006-12-27 15:53:28 · answer #10 · answered by lukasz88 2 · 0⤊ 0⤋