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How do you solve 2x - y = -5 and x + 1 = 0?

1 Answer

Sep 16, 2015

#x=-1# and #y=3#

Explanation:

First we look at an equation with one unknown only,
To find what is #x#;

#x+1=0#

#x=-1#

Then, we substitute #x=-1# into #2x-y=-5# to find #y#;

#2x-y=-5#

#2(-1)-y=-5#

#-2-y=-5#

#-y=-5+2#

#-y=-3#

#y=3#

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