Answer:
equation 1
-20=x*y
x=4
y=-5
can be written as
-20=4*(-5)
-20=-20
equation 2
-1=x
-1=4+(-5)
-1=-1
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Answer:
equation 1
-20=x*y
x=4
y=-5
can be written as
-20=4*(-5)
-20=-20
equation 2
-1=x
x=4
y=-5
can be written as
-1=4+(-5)
-1=-1