Diketahui rumus f(x) =2x-5.jika f(k)=-15 maka nilai x adalah..

f(k) = 2k - 5 = -15
2k = -10
k = -5

semoga membantu :)

f(x)= 2x-5
f(k)= 15
f(15)= 2x-5
-2x= -5+15
-2x= 10
x= 10/2
x=5