Question

seven times a two digit number is equal to four times the number will be reversed find the number if the sum of digit is 3​

Answer 1

Answer:

x=1,y=2

Step-by-step explanation:

7(xy)=4(yx)  given condition

and x+y=3

if we substutite x=1 and y=2 we get the answer

Answer 2

let a two digit no. be xy or 10x + y

reversed no. will be yx or 10y + x

acc. to ques.

7(10x + y) = 4(10y + x ) ......(i)

70x + 7y = 40y + 4x

70x - 4x +7y -40y = 0

66 x - 33y =0

(divide by 33 )

2x - y =0.........(ii)

acc. to .2nd condition of the ques.

10x + y =3 .......(iii)

comparing (ii) and (iii) equations

2x. - y=0

10x+y=3

_________

12x =3

x =1/4

put x=1/4 in eq.( ii)

2x - y=0

y=1/2

hope it helps...u may find the no. by putting values