help please!!!
2007-01-18 10:07:42 · 5 answers · asked by Kate 1 in Science & Mathematics ➔ Mathematics
All you have to do is change the words into mathematical symbols.
9 less than=-9
5 times a number=5x
7 more than the number=7+n
Put it all together and you get 5n-9=7+n.
Simplify:
4n-9=7
4n=16
n=4
2007-01-18 10:16:36 · answer #1 · answered by JAB 2 · 0⤊ 0⤋
First we have to translate the sentence into an equation. We will use the variable x.
9 less means subtract 9,
5 times means multiply the number by 5
is stands for equals
7 more than, means add 7 to the number. So our equation is
5x - 9 = x+7
So we solve this for x
4x = 16 (Subtracted x from right side, and added 9 to left side)
x = 4
2007-01-18 18:15:54 · answer #2 · answered by leo 6 · 0⤊ 0⤋
5x-9+9=7+9
7+9=16
4/16=4
x=4
2007-01-18 18:39:31 · answer #3 · answered by Anonymous · 0⤊ 0⤋
5x-9 = x+7
4x=16
x=4
2007-01-18 18:11:56 · answer #4 · answered by Rockit 5 · 1⤊ 0⤋
5x-9=x+7
4x=16
x=4
2007-01-18 18:12:22 · answer #5 · answered by bruinfan 7 · 1⤊ 0⤋