Ayuda please ,es mi examen.​

Tanya has $42 to spend at the dolphin island store. tshirts sell for $7 each and a pair of sunglases sells for $6.tanya buys 3 tshirts. how many pairs of sunglases can she buys with the amount of money she has left

If 3x+8=3x+8 is it one solution or no solution

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5