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Mathematics 16 Online
OpenStudy (anonymous):

solve using any method 3x=y-4 2y-6x=12

OpenStudy (anonymous):

please help

OpenStudy (mrnood):

First multiply both sides of the top equation by 2 Post your new equation here

OpenStudy (anonymous):

which equation do i multiply by 2

OpenStudy (mrnood):

What I said above

OpenStudy (anonymous):

6x=2y-8

OpenStudy (mrnood):

Ok that's good Now add that equation to the SECOND equation in oyur question

OpenStudy (anonymous):

12x+4y-4

OpenStudy (anonymous):

12x=4x-4

OpenStudy (anonymous):

12x=4y-4 sorry

OpenStudy (mrnood):

No - that is not correct. 6x=2y-8 2y-6x=12 When you ADD them the x term will disappear

OpenStudy (anonymous):

Ok so that would be 4y=4

OpenStudy (anonymous):

Y=1

OpenStudy (mrnood):

No that is not correct- however I now see a complication to this

OpenStudy (mrnood):

If you re-arrange the original equations: y=3x+4 y=3x+6 You can see that both lines have the same slope (=3) Therefore they never intersect so there is no solution to these as simultaneous equations

OpenStudy (anonymous):

And what is that

OpenStudy (anonymous):

I dont get it there shouldn't there be a y value

OpenStudy (mrnood):

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