Sara says, "If you subtract 19 from my number and multiply the difference by - 2, the result is -4." What is Sara's number?
Sara's number is

I don’t know how you got 27 but that’s not right. Sara’s number is 21. Because this is the problem

X=Sara’s number
(19-x) • 2 = -4
38-2x = -4
To bring 38 to the other side subtract it
-2x = -4 -38
-2x= -42
Divid -2 by -42 to get X by itself
X = 21

Put X into the equation to check
(19-21) •2= -4
-2•2 = -4
-4=-4

If I got that wrong I’m sorry and I’m sorry for being cocky but 27 doesn’t make sense but I could have gotten the equation wrong in the beginning

The volume is 2212m cubed