2007-02-02 23:32:06 · 26 answers · asked by sanjeev y 1 in Science & Mathematics ➔ Mathematics
4x-15=9
4x=24
x=6
2007-02-02 23:36:22 · answer #1 · answered by the truth 4 · 0⤊ 1⤋
6
2007-02-06 01:47:47 · answer #2 · answered by Aman M 1 · 0⤊ 0⤋
6
2007-02-03 08:21:52 · answer #3 · answered by Mohammed Fahad 1 · 0⤊ 1⤋
6
2007-02-03 07:35:44 · answer #4 · answered by Anonymous · 0⤊ 1⤋
6
2007-02-03 07:34:48 · answer #5 · answered by davelibby321 4 · 0⤊ 1⤋
First, you need to:
(1) break the problem up into chunks
(2) write the equations,
(3) then put them together
(4) solve.
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(1) fifteen less than 4 times a number
Break the problem down into seperate chunks:
fifteen less than AND 4 times a number AND is 9
which would be:
i. 15 less than (the above)
ii. 4 times a number
iii. is 9
---------------
(2) Put it into equations
fifteen less than = -15
4 times a number = 4n
is 9 = =9
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(3) Put them together
Because you are saying "15 less than 4 times a number is 9" it would be "4n - 15 = 9" instead of "15 - 4n = 9" .
So therefore, the equation put together would be : 4n - 15 = 9.
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(4) Then solve
4n - 15 = 9
Put the -15 on the other side of the equals sign and it changes from (-) to (+) so the equation would now look like:
4n = 9 + 15
Add 9 and 15 up which would be 24
The equation is now: 4n = 24
To work out n, divide 24 by 4 and you'll get 6 as the answer = 24 / 4 = 6
So therefore, 6 is the number.
2007-02-03 07:51:11 · answer #6 · answered by Anonymous · 2⤊ 1⤋
let the nuumber be x,
then,fifteen less=-15
four times =4x
put together=4x-15
according to given question,
4x-15=9
taking 15 the other side,
we can rewrite the equation as,
4x=15+9
4x=24
x=24/4
x=6
sooo,the final answer is 6
2007-02-05 11:00:57 · answer #7 · answered by pvr_patel 1 · 0⤊ 0⤋
15-4x=9 thats the expression when the problem is translated into algebraic expression. Subtract 15 from both sides and it will give you -4x=-6 then divide both sides by -4, it will give you x=3/2. Though 6 can also be the value of x (24-15 is also equal to 9) 3/2 is also correct. 15-4(3/2)= 15-6=9! Got it?
2007-02-03 08:02:09 · answer #8 · answered by p319 1 · 0⤊ 1⤋
let x be the number
so 15 less than 4 times a number will be
4x-15=9
4x=9+15
x=24/4
x=6
so the number is 6
2007-02-03 07:45:40 · answer #9 · answered by shiva s 1 · 1⤊ 1⤋
Imagine you have the number called pear. And pear is the answer.
4 x pear - 15 = 9
4 x pear = 9 + 15
4 x pear = 24
pear = 24 / 4
pear = 6
So, the number is 6.
2007-02-03 07:37:40 · answer #10 · answered by Gaara of the Sand 3 · 1⤊ 1⤋
Let number be Y
4Y - 15 = 9
4Y = 9 + 15
4Y = 24
Y = 6
2007-02-03 08:00:52 · answer #11 · answered by Como 7 · 0⤊ 1⤋