Question #1dd1a

1 Answer
Apr 28, 2017

See below.

Explanation:

#-4x+9y=9#
#x-3y=-19#

If we substitute the #x#, this will be the most efficient method.
From the second equation,

#x=3y-19#

Substitute into the first equation.
#-4(3y-19)+9y=9#

#-12y+76+9y=9#
#-3y=-67#

#y=67/3#

Plug this back into the second equation,
#x=3(67/3)-19#

So #x=48#

Thus our solution is #(48,67/3)#