Question

write the number unit digit is 2 digit tens digit 5 and handrails digit 7​

Answer 1

Answer:

Let the two digit number be 10x + y where

y is units digit and x is ten's digit.

It is given that

x = 2y + 2 ... (1)

and 10y + x = 3(x+y)+5.... (2)

an solving equation (2) and (1)

10y + x = 3x + 3y + 5

⇒ 7y-2x = 5

.. 7y - 2(2y + 2) = 5

3y -4=5

3y=9

y = 3

and x = 2y + 2 = 6+2=8

the two digit number is 83

Answer 2

Answer:

Let the two digit number be 10x +y where

y is units digit and x is ten's digit.

It is given that

x = 2y + 2 ... (1)

and 10y + x = 3(x+y)+5 (2)

an solving equation (2) and (1)

10y + x = 3x + 3y + 5

→ 7y-2x = 5

7y -2(2y + 2) = 5

3y -4-5

3y=9

y = 3

and x = 2y + 2 = 6+2=8

the two digit number is 83

Answer 3

Answer:

Let the two digit number be 10x +y where

y is units digit and x is ten's digit.

It is given that

x = 2y + 2 ... (1)

and 10y + x = 3(x+y)+5 (2)

an solving equation (2) and (1)

10y + x = 3x + 3y + 5

→ 7y-2x = 5

7y -2(2y + 2) = 5

3y -4-5

3y=9

y = 3

and x = 2y + 2 = 6+2=8

the two digit number is 83

Answer 4

Answer:

Let the two digit number be 10x +y where

y is units digit and x is ten's digit.

It is given that

x = 2y + 2 ... (1)

and 10y + x = 3(x+y)+5 (2)

an solving equation (2) and (1)

10y + x = 3x + 3y + 5

→ 7y-2x = 5

7y -2(2y + 2) = 5

3y -4-5

3y=9

y = 3

and x = 2y + 2 = 6+2=8

the two digit number is 83