At tire depot a pair of new tires sells for $216 the managers special advertises sun tire selling at a rate of $380 for four tires how much do you save per tire if you purchased the managers special

Find dollars per tire by dividing dollars by the corresponding number of tires.

The per-tire cost for the pair is $216/2 = $108.

The per-tire cost for the special is $380/4 = $95. This represents a savings per tire of $108 - 95 = $13.

take the logarithm of both sides (the base of the log doesn't matter):

apply the exponent property - this says that :

distribute the log terms on both sides:

group like terms together:

divide through both sides by the coefficient on :

you can do some additional rewriting here using the properties of the logarithm to simplify things if you like: