Answer
Substitute w by 7
7^3
7x7x7 =343
-14a-5=-12
+5 +5
-14a=-7
Divide -7 by -14a
a=2
Answer:
18/10
Step-by-step explanation:
Because he ended up paying $24 more than the actual price of the drill, this is the amount of interest he paid.
In total, the repairman pays $324 in 6 equal payments. So, each payment was

.
Well let's see.

The equation has exactly one solution.
Hope this helps.