View Full Version : A formula
mattdog13
Nov 15, 2006, 07:50 PM
Three-fourths of a number increased by 1 is 7. what is the number.
kyop
Nov 15, 2006, 09:54 PM
Remember the key words in mathematics:
Of = times (multiply)
Is = equals
(There are a lot more, but not that are pertinent to this problem.
three-fourths of a number increased by 1 is 7.
3/4 * x + 1 = 7
So: (3/4)x + 1 = 7
Solving it as a two step equation:
(3/4)x + 1 = 7
-1 -1
(3/4)x = 6
(4/3) * (3/4)x = (4/3) * 6
1x = 8
x = 8
I am assuming you can do the necessary arithmetic so I left out detailed descriptions of those steps. If you still don't get it, write back and I'll help you with that.
asterisk_man
Nov 16, 2006, 06:34 AM
"three-fourths of a number increased by 1 is 7. what is the number."
(3/4 * x) + 1 = 7
or
3/4 * (x + 1) = 7
The question is ambiguous to me.
kyop
Nov 16, 2006, 08:19 AM
Because of:
a) the obvious level of the problem and
b) the wording of the problem
I would have to say that it is intended to be 3/4x + 1 = 7
The problem doesn't work out "cleanly" the other way and the wording (although slightly ambiguous, granted) leans far more towards my set-up. The other way 3/4(x + 1) = 7 would be worded three-quarters of the sum of a number and 1 or three-quarters of a number that is increased by 1.
Sorry, I just don't buy the ambiguity. You're reading too much into it.
s_cianci
Nov 19, 2006, 06:47 PM
Exactly - order of operations removes the ambiguity.
Lady enfuego
May 26, 2008, 02:36 PM
Solve limit equation: lim x is at 2
x^3-2x^2+4x-8/x^4-2x^2=x-2
morgaine300
May 26, 2008, 04:08 PM
Solve limit equation: lim x is at 2
x^3-2x^2+4x-8/x^4-2x^2=x-2
Please start your own thread for your question. You've tacked this onto a 2 year old post that is also unrelated to your question. It tends to cause people to waste time reading through a thread just to get to an entirely different question.