If y =2.5 x +4 and 15x-2 =40 then y=?

If y =2.5 x +4 and 15x-2 =40 then y=?

A 36

B 28

C 22

D 11

Solution

Correct Answer: Option D

15x -2 =40
=> 15x = 42
x = 42/15
So, y=2.5×42/15+4
=25/10X42/15+4
= 7+4
= 11