SOLUTION: 1. A number consist of 2 digits whose is 11. If the digits are interchanged,the value of the number decrease by 20sq.m. Find the length and breadth of the room.
2. If the numerato
Algebra.Com
Question 198533: 1. A number consist of 2 digits whose is 11. If the digits are interchanged,the value of the number decrease by 20sq.m. Find the length and breadth of the room.
2. If the numerator of a fraction is decreased by 1 its value becomes 2/3, but if the denominator is increased by 5, the value becomes 1/2 . what is the fraction.
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
I can't understand question 1.
.
2)
Let n=numerator and d=denominator
(n-1)/d=2/3
3(n-1)=2d multiply each side by 3d
3n-3=2d
3n-2d=3
.
n/(d+5)=1/2
2n=d+5 multiply each side by 2(d+5)
2n-d=5
-4n+2d=-10 multiply each side by -2
.
3n -2d = 3
-4n+2d=-10
-----------------add
-n=-7
.
n=7
.
21-2d=3
-2d=-18
d=9
.
7/9 is the fraction.
.
Ed
RELATED QUESTIONS
A number consists of 2 digits whose sum is 11 . If the digits are interchanged the value... (answered by fractalier)
The sum of the digits of a two digits number is 11.if the digits are interchanged. The... (answered by Alan3354,solver91311,greenestamps)
The sum of the digits of a two-digit number is 11. If the digits are interchanged, the... (answered by Alan3354)
A number is made of two consecutive digits but if the digits are interchanged. the... (answered by Edwin McCravy)
In a positive number of two digits, the sum of the digits is 15. If the digits are... (answered by y6n3o9p4)
In A Positive Number Of Two Digits, The Sum Of The Digits Is 15. If The Digits Are... (answered by josgarithmetic,MathTherapy,Alan3354)
In a positive number of two digits, the sum of the digits is 15. If the digits are... (answered by Alan3354)
The sum of the digits of a two-digit number is 11. If the digits are interchanged, the... (answered by josgarithmetic)
The sum of the digit of a two digits number is 11. If the digit are interchanged, the... (answered by ewatrrr)