13 + X = 31 Or 31 - 13 = X Ergo X = 18
X= -23
13 x 23 means that, if you count 13 sets of 23 of something...or 23 sets of 13 of something, you will have 299 of that item. For example, if you have 13 rows with 23 seats in each row, you will have a total of 299 seats.
23 - x equals 142 = -119
Yes, because: x+7 = 23 x = 23-7 x = 16
X +13 equals 22, X equals nine
23 x 23 equals 529.
23
x=0
x = 23
x=6=x=5+x=13+x=20 x cannot = x+5. This question has no answer.
5