the sum of 3 times a number and 2, added to 7 times a number

Answer 1

(3x+2) + 7x

3 times a number is 3x and if you're adding that to 2 (the sum of) you get the 3x+2 and it says all of that has to be added to 7 times a number so the first half has to be in parentheses because you want all of it multiplied by the next half. and then 7 times a number is similar to 3 times a number so it's 7x