for example
x=3
&
3x+y=5
2007-01-16 16:36:10 · 9 answers · asked by DaGhettoCinderella 2 in Science & Mathematics ➔ Mathematics
x=3
3x+y=5
so
3x3+y=5
9+y=5
y=5-9
y=-4
2007-01-16 18:18:56 · answer #1 · answered by Helper X 2 · 0⤊ 0⤋
If x = 3, then
3x + y
= 3(3) + y
= 9 + y
= 5
subtracting 9 from both sides
y = 5 - 9 = - 4
Hence,
x = 3 , y = -4
2007-01-16 17:32:14 · answer #2 · answered by Kinu Sharma 2 · 0⤊ 0⤋
If x = 3, then 3x+y = 3(3)+y = 9+y = 5
subtracting 9 from both sides
y = 5-9 = -4
2007-01-16 16:40:38 · answer #3 · answered by kellenraid 6 · 0⤊ 0⤋
3 * 3 + y = 5
9 + y = 5
y = 5- 9
y = -4
2007-01-16 16:39:55 · answer #4 · answered by sg 2 · 0⤊ 2⤋
3x+y=5
3*3+y=5
9+y=5
y=5-9
= -4
x= 3
y= -4
2007-01-16 17:15:01 · answer #5 · answered by loally 2 · 0⤊ 0⤋
y=-4
2007-01-16 16:40:53 · answer #6 · answered by Cirrus 1 · 0⤊ 0⤋
x=3 so
3(3)+y=5
9+y=5
y=-4 and x=3
2007-01-16 17:58:09 · answer #7 · answered by pillsburry doughboy 2 · 0⤊ 0⤋
substitute 3 for x
3*3+y=5
9+y=5
y=-4
(3, -4)
2007-01-16 16:48:56 · answer #8 · answered by yupchagee 7 · 0⤊ 0⤋
(1): ax+by=c
(2) :dx+ey=f
(-d)*(1) and a*(2) , Sum (1) And (2) :
-d*b*y+a*e*y=-d*c+a*f
Solve last equation!
2007-01-16 18:30:37 · answer #9 · answered by alaki 1 · 0⤊ 0⤋