Help me solve this please.

Solve the equation for x by graphing.2^x – 4 = -4^x + 4

Dimitri used a coupon that saved him 80 percent, or $6.87. he paid $34.35 for the items. dimitri used a coupon that saved him 80 percent, or $27.48. he paid $34.35 for the items. dimitri used a coupon that saved him 80 percent, or $6.87. the price of the items before the discount was $34.35.dimitri used a coupon that saved him 80 percent, or $27.48. the price of the items before the discount was $34.35.

Kate has 50 quarters and dimes. she has a total of $9.80. how many dimes that she have?