Identify the solution of each equation from the list given

29 + d = 54; 24,25,26

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?