I need help with systems of equations.
EX:
x+1/3y=-11
3x/4-y/2=-15
2006-08-01 13:02:24 · 9 answers · asked by nicluvswings 3 in Science & Mathematics ➔ Mathematics
x=-1/3y-11
3x-2y=-60
-y-33-2y=-60
-3y=-27
y=9
x=-1/3(9) - 11
x=11.037
2006-08-01 13:09:17 · answer #1 · answered by J 4 · 0⤊ 0⤋
First
x=-1/3y-11
Seconde
3x-2y=-60
Replacing x
-y-33-2y=-60
-3y=-27
y=9
Fill in y = 9
x=-1/3* 9 - 11 = -3 - 11 = -14
Check
-14 + 1/3*9 = -14 + 3 = - 11
3*-14/4 - 9/2 = -42/4 - 9/2 = -15
2006-08-01 20:17:53 · answer #2 · answered by Anonymous · 0⤊ 0⤋
from the first equation: x = -11 -1/3y
substitute this into second to get:
3(-11 -1/3y) -y/2 = -15
-33 -y -y/2 =-15
1.5 * y = -18
y = -12
and then you get x = -7
2006-08-01 20:11:34 · answer #3 · answered by Jim R 3 · 0⤊ 0⤋
-3/4 (x +1/3y) = -3/4 (-11)
-3/4x -3/12y = 33/4
adding this to the other equation, you get
-3/4y = -27/4
3/4y = 27/4
3y = 27
y = 9
plugging this in to one of the equations:
x = -14
2006-08-01 20:21:14 · answer #4 · answered by David S 5 · 0⤊ 0⤋
plz add details like:
1. on the 1st equation r u multiplying 1/3 by y and does it equal -11
2. on the 2nd equation are u dividing 3x by 4 and y by 2 and u spose to get -15
2006-08-01 20:11:42 · answer #5 · answered by wllshtt 2 · 0⤊ 0⤋
Read the book.
2006-08-01 20:06:19 · answer #6 · answered by aaupthemeggs 2 · 0⤊ 0⤋
David S has it right.
x = -14
y = 9
2006-08-01 20:41:56 · answer #7 · answered by tougeu 2 · 0⤊ 0⤋
Thats simple, but you need to figure it out yourself. We aren't going to be here to take you S.A.T's for you.
2006-08-01 20:07:09 · answer #8 · answered by darkdwarf12 1 · 0⤊ 0⤋
I have no idea
2006-08-01 20:52:54 · answer #9 · answered by sweet 2 · 0⤊ 0⤋