321 + 321 = 642
321 + 432 = 753
321
Well, darling, 555 plus 321 equals 876. It's simple math, honey, nothing to lose sleep over. Go ahead and impress your friends with your newfound knowledge of addition.
Without an equality sign the given expression is not an equation but if you mean -6x = 321 then the value of x works out as -53.5 which is the solution to the equation.
160.5
321 + 321 = 642
321 is an integer, so the closest integer would be 321. (If 321 itself doesn't count, 322 and 320 are the same distance from it, and are the next closest.)
Put 321 into three columns: Hundreds, Tens, and units. Then you have 3 Hundreds, 2 tens and 1 unit. It therefore is 320. However, if the unit was from 5 -9, you would round the ten up to 3.
-182 + 321 = 139
200 + 175 + 286 + 304 + 321 = 1,286
Each of these numbers will go evenly into 231: 1, 3, 7, 11, 21, 33, 77, 231.
321 + 432 = 753
123 + 321 = 444
Episode 321, I presume.
If you are rounding to the nearest tens, 320 is the answer. If you are rounding up to the nearest tens, 330 would be the answer. The difference is the word "up", which specifies that the answer will be greater than 321. The answer of 320 would be rounding down.
Most likely it's a Mossberg 321-320