Tnx!
2006-09-07 00:02:48 · 11 answers · asked by double B 2 in Science & Mathematics ➔ Mathematics
Check the question for accuracy. When you solve the first equation for "y" you get y = 13 - 2x. When you plug this into the second equation you get:
4x + 2(13-2x) = 23
4x + 26 - 4x = 23
26 = 23
Is there a mistake in your numbers?
2006-09-07 00:10:59 · answer #1 · answered by young108west 5 · 0⤊ 0⤋
No Solution
2x + y = 13
4x + 2y = 23
Multiplying the top equation by - 2
-2(2x) + (-2)(y) = -2(13
-4x - 2y = -26
4x + 2y = 23
the coefficient and variable cancell
In the procedure of elimination for system of equations only one coefficient and variable should be eliminated. Not both.
2006-09-07 00:41:51 · answer #2 · answered by SAMUEL D 7 · 0⤊ 0⤋
looks like there is a typo
take the first equation and double it, you get:
(a) 4x + 2y = 26
which compares with the second equation:
(b) 4x + 2y = 23
this does not work, you cannot have the same things be equal to 26, then to 23.
worse, if you tried to eliminate, by subtracting (a) from (b), you'd get:
0 = -3
which is not much better ;-)
2006-09-07 01:11:13 · answer #3 · answered by AntoineBachmann 5 · 0⤊ 0⤋
2x+y=13
4x+2y=23
you have to get rid of the y or the x i usualy get rid of the x first :) and here is how we do it :)
-2 ( 2x+y=13) which is
-4x-2y= -26
and you add them together
-4x-2y= -26
4x+2y=23
reasulting in
0 = -3 !!!!!!!!!!!!! some thing wrong re check plllllllllzzzzzz
2006-09-07 04:12:25 · answer #4 · answered by Anonymous · 0⤊ 0⤋
1st
2x+y=13
y=13-2x
sub:
4x=23-2(13-2x)
4x=23-26+4x
4x=-3+4x
4x-4x=-3
0=-3
SORRY THEReS NO ANSWER...
2006-09-07 01:06:40 · answer #5 · answered by Hashiman S 1 · 0⤊ 0⤋
2x+y=13 / * (-2)
4x+2y=23
-4x-2y= -26
4x+2y= 23
+________
0=-3 impossible => x,y are not real numbers
( I'm so bored! :-( )
2006-09-07 00:12:28 · answer #6 · answered by Milica 2 · 0⤊ 0⤋
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2016-10-14 10:09:40 · answer #7 · answered by hultman 4 · 0⤊ 0⤋
2x + y = 13
4x + 2y = 23
Multiply top by -2
-4x - 2y = -26
4x + 2y = 23
0x + 0y = -3
so unless you typed something wrong, these problem are parallel and therefore have NO SOLUTION
2006-09-07 07:24:24 · answer #8 · answered by Sherman81 6 · 0⤊ 0⤋
well...i tried in many different ways but, everything canceles!!!!!:
multiply the 1st equation by (-2):
-4x-2y=-26
4x-2y=23
-4x cancel with 4x....& -2y cancel with 2y!!!!!
2006-09-07 00:13:40 · answer #9 · answered by white skull 3 · 0⤊ 0⤋
if we multipy the 1st by one
4x+2y = 26
this and 2nd equation both are inconsistent
so there is no solution
Geometrically these are parallel lines
2006-09-07 01:50:23 · answer #10 · answered by Mein Hoon Na 7 · 0⤊ 0⤋