3 3n-9=54 to nearest hundredth value what is value of n

Idont get this question can someone me solve it? ** the distance light travels in one second (1 light second) is about 1.86 ×10^5 mi. saturn is about 475 light-seconds from the sun. about how many miles from the sun is saturn..my guess is 8.83* 10^7 you so much

Ineed in figuring out this problem.

Graph the linear function using the slooe and y intercept