Which equation is equivalent to 4s= t+2

The sum of two numbers is 12 and their difference is 18 what are the two numbers

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. consider the given table.

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.