If (3x + 1) + 2x + (x - 3) equals 64 then what is x?

2-digit numbers less than 91 which are 1 less than a multiple of 10

This is about circle theorems. someone asap : (

Taylor wants to paint his rectangular deck that is 41 feet long and 24 feet wide. a gallon of paint covers about 350 square feet. how many gallons of paint will taylor need to cover the entire deck? round your answers to two decimal places when necessary.