Question

If (5,y ) is a solution of 5x + 8y = 9, What is the value of y?

Answer 1

Answer:

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