Question

(3x+y)if it is 66number then y is unit place then x is equal to. ...​

Answer 1

Answer:

suppose that,

The two digit number is 10x+y

Then, the unit palace is y and tens palace is x

Step-by-step explanation:

According to given question,

y=x  

2

……   (1)

Then,

Again, according to given question,

10x+y+54=10y+x

⇒10x−x+y−10y+54=0

⇒9x−9y+54=0

⇒x−y+6=0......(2)

From equation (1) to,

⇒x−x  

2

+6=0

⇒−x  

2

+x+6=0

⇒x  

2

−x−6=0

⇒x  

2

−(3−2)x−6=0

⇒x  

2

−3x+2x−6=0

⇒x(x−3)+2(x−3)=0

⇒(x−3)(x+2)=0

For,

x−3=0

x=3

Put in (2)

Then,

x−y+6=0

3−y+6=0

−y+9=0

y=9

Then,

The number is

10x+y

⇒10×3+9

⇒39

Hence, this is the answer.