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24-07-2018
Mathematics

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please help me ASAP!!

please help me ASAP class=

Respuesta :

25-07-2018

I don't like these computer choice thingies. It detracts from the math.

[tex]-x - 2y = 7[/tex]

[tex]5x - 6y = -3[/tex]

If we want to eliminate x we multiply the first equation by 5 then add it to the second:

[tex]-5x - 10y = 35[/tex]

[tex]5x - 6y + (-5x - 10y) = -3 + 35[/tex]

[tex]-16y = 32[/tex]

OK, that's how it's done. Reading through the choices, that's choice D.

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