Need the answers urgently. Write an equation and solve it. ( solve it like 2 +x= 7)

a) Ken bought 12 books and 7 magazines. How many books and magazines did he buy altogether?

B) A book costs $10 and a poster is $4 cheaper than the book. How much does the poster cost?

C) a pet store sells parrots and canaries. There are 27 canaries in the store. There are 12 fewer parrots than canaries. How many parrots are in the store?

D) Monique read 12 pages on Sunday. She read 7 pages more on Sunday than on Monday. How many pages did she read on Monday?

E) A cake recipe calls 5 cups of berries. Jose has 3 cups of raspberries and some blueberries. How many cups of blueberries will he need for the cake.