Question

Solve the given linear system
2x-4y=-6
-x+2y=3

Answer 1

Just sum the equations !:)

Answer 2

you can solve by elimination so you multiply the 2nd equation by 2 to get -2x+4y=6
so you get
2x-4y=-6
-2x+4y=6
0=0
since both sides are the same the answer is all solutions meaning they are the same line

Answer 3

But after that find a way to kill one of the X s or Y s !
@insanitycat said it for you with kill X s complate !

Answer 4

uhmm.. could you provide example @E.ali

Answer 5

Sure !
Look care fully !

Answer 6

sure..

Answer 7

If we have :
9x-7y=1
5x+7y=3
there Y s are Symmetric .
So if we sum the equations have :
9x+5x+7y-7y=1+3
have :
14x+0=4
14x=4
x=4/14
Got it ?:)

Answer 8

this can also be solved with substitution

Answer 9

@texaschic101 :Yes !
Thank you !

Answer 10

-x + 2y = 3
-x = -2y + 3 (multiply by -1 to make x positive)
x = 2y - 3

now sub 2y - 3 in for x in the other equation and solve for y. Once y is found, sub that back into either equation and solve for x.

Answer 11

but @texaschic101 you see.

2x-4y=-6
2(2y-3)-4y=-6
4y-6-4y=-6
-6=-6

Answer 12

so y=0?

Answer 13

no....
2x - 4y = -6
2(2y - 3) - 4y = -6
4y - 6 - 4y = -6 (add 6 to both sides)
4y - 4y = -6 + 6
0 = 0

if you get a problem where the end result is EQUAL, the the solution to this problem is INFINITE SOLUTIONS

now if the problem would have ended 0 = 3 or 2 = 4, these are incorrect and the answer for this would have been no solution.

Answer 14

so y=0?

Answer 15

The answer to this problem is INFINITE SOLUTIONS.

Answer 16

ooh.. i see.. thanks :))

Answer 17

its ok :)

Answer 18

thank you very much :"> btw, how young are you?