diketahui fungsi f didefinisikan f:x -> px + q. jika f(2x+1) = 7x - 2. nilai dari f(5) adalah...

2x+1 = y
2x = y-1
x = y-1/2

f(x) = 7(x-1/2) - 2
= (7x-7)/2 - 2
= 7x-7-4/2
= 7x-11/2

f(5) = 7(5)-11/2
= 35-11/2
= 24/2
= 12