If (5,y ) is a solution of 5x + 8y = 9, What is the value of y?
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5x+8y=9
5x5+8y×y=9
25+8ysquare=9
8ysquare=9-25
8ysquare=16
y square=16÷8
ysquare=2
y=under root 2
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