student received a coupon for 19​% off the total purchase price at a clothing store. Let c be the original price of the purchase. Use the expression below for the new price of the purchase. Write an equivalent expression by combining like terms.

The expression for the new price of the purchase after applying the coupon is:

c - 0.19c

To combine like terms, we simplify the expression:
c(1 - 0.19) = c(0.81)

Therefore, an equivalent expression by combining like terms is:
0.81c