Question

The digits of a two digit number differ by 3. If the digits are interchanged and the resulting number is added to the original number,we will get 143.what can be the original number.

Answer 1

Step-by-step explanation:

Let the two digits be x, y

x-y=3 eq1

10x+y the required number

Interchanging

10y+x

10x+y+10y+x=143

11x+11y=143

x+y=13 eq 2

Solve 1 and 2

x+y=13

x-y=3

2x=16

x=8

8+y=13

y=13-8

y=5

The original number is 10x+y

=10×8+5

=85

=

Answer 2

Answer:

Step-by-step explanation:x*5/2+2/3=-7/12,

5x/2+2/3=-7/2,

denominators L.C.M=6

5x/2*6+2/3*6 total /6,

15x+4= -7/2,

30x+8=-7,

30x=-15,

x=-15/30,

x=-1/2.

hence the rational number should be =-1/2