Is (-5, -5) a solution to this system of equations?
=
y = -x - 7
y = x-3
yes
no
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Answer:
no
Step-by-step explanation:
equate the two equations (make them equal to each other)
-2/5x - 7 = 2/5x - 3
get rid of the fractions by multiplying everything by 5
5(-2/5x - 7 = 2/5x - 3)
-2x - 35 = 2x - 15
solve
-2x - 35 = 2x - 15
-2x - 2x = -15 + 35
-4x = 20
x = -5
plug in "x" to one of the starting equations (I'm using the second one)
y = 2(-5) - 15
y = -10 - 15
y = -25
an easier way would be to plug in the point for "x" and "y"
-5 = 2(-5) - 15
-5 = -10 - 15
-5 = -25 FALSE