2007-09-06 15:15:22 · 8 answers · asked by Kim 1 in Science & Mathematics ➔ Mathematics
let the number be x
according to the problem
3x+17=5
3x=5-17= -12
x= -12/3= -4
Therefore the number is -4
2007-09-06 15:20:46 · answer #1 · answered by alpha 7 · 0⤊ 0⤋
Let the number be x
3 times a number is 3(x)
The sum of 3(x) and 17 is 5
3(x) + 17 = 5
3x +17 - 17=5 -17
3x=-12
3x/3=-12/3
x=-4
2007-09-06 22:26:39 · answer #2 · answered by Grampedo 7 · 0⤊ 0⤋
basically, this is saying
3x+17=5
where x is the "number"
if you are having trouble imagining this formula from the problem, think of it in parts like this:
The (sum of (three times a number) and 17) is( 5 )
__________________3x__________ +__17__= 5
to solve your new equation, follow these steps
3x+17=5
(subtract 17 from both sides)
3x=-12
(divide both sides by 3)
x=-4
to double check, go through the word problem again, this time, thinking of the "number" as -4
3*(-4) + 17=5
-12+17=5
bingo
2007-09-06 22:25:12 · answer #3 · answered by Tryingtohelp 2 · 0⤊ 0⤋
3x + 17 = 5
- 17 -17
3x = -12
3x/3 = -12/3
x = -4
2007-09-06 22:20:09 · answer #4 · answered by RAWR. 5 · 0⤊ 0⤋
3n + 17 = 5
3n = -12
n = -4
2007-09-06 22:19:40 · answer #5 · answered by Beardo 7 · 0⤊ 0⤋
(3x)+17=5
x=-4
2007-09-06 22:20:30 · answer #6 · answered by BookMartian 3 · 0⤊ 0⤋
-4 is your answer.
2007-09-06 22:20:06 · answer #7 · answered by arielena_123 2 · 0⤊ 0⤋
Try doing your OWN homework next time ;););)
2007-09-06 22:19:45 · answer #8 · answered by Bubbles 5 · 0⤊ 1⤋