A. 24
B. 25
C. 53
D.546
2006-08-14 13:29:15 · 22 answers · asked by love4music 1 in Education & Reference ➔ Primary & Secondary Education
B. 25.
The unknown number plus 14 equals 39, therefore 39 minus 14 must equal the unknown number. Because 39 minus 14 equals 25 then the answer is B.
It's a case of turning the equation around and subtracting 14 from 39.
Try these to see if you've got the hang of it...
X + 3 = 16. Y + 19 = 30. Z + 21 = 56.
The answers you get should be X = 13, Y = 11 and Z = 35
2006-08-14 13:32:19 · answer #1 · answered by Trevor 7 · 0⤊ 0⤋
B R=39-14
R=25
2006-08-14 20:34:17 · answer #2 · answered by Mr. Abercrombie 2 · 0⤊ 0⤋
B 25
25+14=39
2006-08-14 20:34:21 · answer #3 · answered by Kukla 2 · 0⤊ 0⤋
R= 25
2006-08-14 20:32:32 · answer #4 · answered by lifeisgood 4 · 0⤊ 0⤋
B 25
2006-08-14 21:07:03 · answer #5 · answered by axegirl72 2 · 0⤊ 0⤋
B.25
2006-08-15 05:43:44 · answer #6 · answered by ekhh 1 · 0⤊ 0⤋
R= B. 25
2006-08-14 20:36:09 · answer #7 · answered by Rage 2 · 0⤊ 0⤋
39 - 14 =25
2006-08-14 20:32:41 · answer #8 · answered by KingRichard 6 · 0⤊ 0⤋
What grade are you in? You want to get R by itself; that is, you want to get "R =" on one side, and whatever numbers on the other side. Since you want just R on the one side, this means that you have to get the +14 on the other side. Since the +14 is added to the R, you need to subtract to get rid of it. That is, you will need to subtract a 14, in order to "undo" having added a 14.
This brings up an important point: No matter what kind of equation you're dealing with -- linear or otherwise -- whatever you do to the one side, you must do the exact same thing to the other side! Therefore, you subtract 14 from the 39. So, your new equation will be R + 14 - 14 = 39 - 14. Your next one will be R = 39 - 14. You can take it from there.
2006-08-14 20:37:49 · answer #9 · answered by temejo1 2 · 0⤊ 0⤋
R+14= 39-14
R= 25
2006-08-14 20:37:33 · answer #10 · answered by no nickname 6 · 0⤊ 0⤋