My son's math, i'm old and can't remember

6 tens = 60 (sixty)

2 tens = 20 (twenty)

Step-by-step explanation:

6 tens is = 60 (sixty)

and 2 tens is = 20 (twenty)

x - 17.95 = 71.80, $89.75

Step-by-step explanation:

Let the original price of the headphones be x

Amount of coupon = $17.95

You pay final amount for the headphones after using the coupon = $71.80

So to find the original price of the headphones, the equation will be

x - 17.95 = 71.80

x = 17.95 + 71.80

x = $89.75

The original price of the headphones would be $89.75