2007-11-15 17:37:57 · 8 answers · asked by Nita S 1 in Science & Mathematics ➔ Mathematics
x + y = 24
- x - 5 y = - 3------ADD
- 4 y = 21
y = - 21 / 4
x - 21 / 4 = 24
x = 96/4 + 21 / 4
x = 117 / 4
x = 117 / 4 , y = - 21 / 4
2007-11-15 18:55:22 · answer #1 · answered by Como 7 · 2⤊ 1⤋
1
2007-11-15 18:27:05 · answer #2 · answered by Anonymous · 0⤊ 0⤋
1
2007-11-15 18:09:20 · answer #3 · answered by Anonymous · 0⤊ 1⤋
3x+3y=3
x+y=1
x=1-y
72x+5y=3
substitute
72(1-y)+5y=3
72-72y+5y=3
-67y=-69
y=69/67
then it is some ugly fractions after that substituting back into x=1-y = -2/67
Check:
3(-2/67) + 3(69/67) =? 3
Divide both sides by 3
-2/67 + 69/67 = 1 yes
72(-2/67) + 5(69/67) = 3?
24(-2/67) + 5(23/67) = 1?
-48/67 + 115/67 = 1?
Yep. It works. Ugly problem.
2007-11-15 17:56:56 · answer #4 · answered by Mark P 2 · 0⤊ 1⤋
3x + 3y = 3 => x+y=1=>*5=>5x+5y=5
72x + 5y = 3 =>
67x=-2=> x=-2/67=-0.0298
y=-.0298
2007-11-15 19:03:53 · answer #5 · answered by gnana 2 · 0⤊ 2⤋
3x + 3y = 3
and
72x + 5y = 3
3y = 3 - 3x
y =(3 - 3x)/3.........1
72x + 5y = 3.........2
substitute 2 into 1
72x + 5[(3 - 3x)/3] = 3
72x + (15 - 15x)/3 = 3
(216x + 15 - 5x) / 3 = 3
216x - 15x + 15 = 3(3)
216x - 15x = 9 - 15
216x - 15x = -6
201x = -6
x = -6/201
x = 0.03
2007-11-15 18:46:22 · answer #6 · answered by Nonoi_Orange 2 · 0⤊ 1⤋
What is this?
2007-11-15 17:53:25 · answer #7 · answered by Small Victories 4 · 0⤊ 0⤋
Very easy, x = 0²³, and y = 0³²
You please substitute and see.
2007-11-15 19:11:50 · answer #8 · answered by Joymash 6 · 0⤊ 2⤋