makemybacon
makemybacon
12-02-2019
Mathematics
contestada
solve by elimination
5x-15y=10
3x-5y=-6
Respuesta :
akephd
akephd
12-02-2019
Multiply bottom equation by -3 to add and eliminate y’s.
So...
5x-15y=10
+-9x+15y=18
You get -4x=28 so x=-7
Plug in to get y
5(-7)-15y=10
-35-15y=10
-15y=45
So y=-3
Check in other equation
3(-7)-5(-3)=
-21+15=-6
So x= -7 and y= -3
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