what is the answer to this question '8y-9y=4' ?

8y-9y=4 is an equation from pre-algebra with pizzazz. I am having a diffulculty with this please help.
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2 Answers

8y - 9y = 4

-y = 4

y = -4
by Level 6 User (23.1k points)

8y-9y=4

-y =4

y = -4

check

8(-4) - 9(-4) =4

-32 +36 = 4

4=4

by Level 6 User (19.3k points)

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