I need solutions for all of them

16.|f 7n+7 and 8n+2 are consecutive even numbers, find product of all possible values for n. 17. The number of units is 2 more than the number of the tens of a 2-digit number. If the product of the number and the sum of its digits is 144, find that number. abba a+b =7. 18.Find product ab, if W_y=2 yxx 19.Find largest possible sum for x+y, if 20. Complete the matching. 1)@+E 2) abba 3) W+ bb Divisible by 9 . Divisible by 37 Divisible by 11 . Divisible by 100 Divisible by 111 papa-9: 21. (1? + E + E = 77 and a at b at 6. find the sum of the least and the largest possible values for abc