Question

Diketahui rumus fungsi f(x) = b -8x. Jika f(b) =-42 ,nilai b= ...

Answer 1

-42=b-8b
-42=-7b
b=-42/-7
b=-6

Answer 2

F(x) = b - 8x
-42 = b - 8b
-42 = -7b
-7b = -42
b = -42/-7
b = 6

nilai b = 6