WHEREISTHEFLOOR
WHEREISTHEFLOOR WHEREISTHEFLOOR
  • 25-01-2018
  • Mathematics
contestada

Can someone help me with this please

Can someone help me with this please class=

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Catya
Catya Catya
  • 25-01-2018
Which method is better is really a matter of opinion. I prefer to do elimination when I can because seems like less steps but that x is alone and can be substituted easily as well.

* elimination method, multiply entire bottom equation by -4 and added equations together

   4x + 2y = -2
-4(x - 3y = 24)
--------------------
     0 + 14y = -98
y = -7

then
x - 3(-7) = 24
x + 21 = 24
x = 3
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