Question

Find the value of y when x equals 11 .
7x-9y=23

Answer 1

7x - 9y = 23         x = 11

7*11 - 9y = 23

77 - 9y = 23

-9y = 23 - 77

-9y = - 54

y = -54/-9

y = 6

I hope this explains it.