Answers

2015-05-26T14:07:53+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Let the tenth place be x and the units place be y
the no.=10x+y
              x+y=11   -(1)
if the digits are reversed unit=x and tenth place =y
the no.=10y+x
(10x+y) +27=10y+x
10y+x - 10x-y=27
9y-9x=27
9(y-x)=27
y-x=3(27divided by 3)
-x +y=3  -(2)

x + y = 11
-x+y  =  3
---------------
0+2y=14
 2y=14
y=7
y=7 in equation (1)

x+y=11
x+7=11
x=11-7
x=4

hence the no.=10x+y
                    =10(4)+7
                    =40 + 7
                    =47


1 5 1
2015-05-26T14:16:02+05:30
let the unit digit be x
since the sum of the digits is 11 , 
the tenth digit is 11 - x
therefore , the number is = (11-x)*10+x
= 110 - 10x + x
= 110 - 9x
if 27 is added , then the number is reversed , 
110 - 9x + 27= 9x + 11
- 9x - 9x = 11 - 110 - 27
- 18x = - 126
x = 126/18
= 7
therefore , the original number is = 110 - 9x 
= 110 - (9*7)
= 110 - 63
= 47

1 5 1
please mark my answer as the best
make mine as the best please
keep calm.the user who has posted this question can only decide that which answer is the best..i thinks ur answer is better than mine
thanks