How do you solve this set of linear equations: #Y= x - 4; y = - x - 6#?

1 Answer
Gió
Oct 30, 2016

I found:
#x=-1#
#y=-5#

Explanation:

We can substitute the first into the second for #y# to get:
#color(red)(x-4)=-x-6#
solve for #x#:
#2x=-2#
#x=-2/2=-1#
substitute this value back, say, into the first equation:
#y=-1-4=-5#

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