What is the result of adding these two equations? −
5
x
−
9
y
=
3
5
x
−
9
y
=
−
2

−5x−9y
5x−9y
​

=3
=−2
​

Blood made up of red and white blood cells work together to form

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Based on the data in your tables, did the light-colored moths have a higher or lower survival rate after the industrial revolution?