Answer:
tax: $18.9
total cost: $333.9
Step-by-step explanation:
$315 × 0.06 = 18.9
18.9 + 315 = 333.9
btw you can also do "315 × 1.06" to get the total cost without having to manually add the tax
Answer:

Step-by-step explanation:

Distribute.

Add 5x and subtract 15 on both sides.


Multiply -1 on both sides.
