Question

In a two-digit number the digit at the tens place is 4 times the digit at the unit place.The sum of the digit and the number is 92. Assuming the digit at the unit place to be x, obtain an equation.

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Answer 1

Let's take number as 10x+y

As per question, 

y=4x, and 

x+y=10

So, x+4x=10

5x=10

x=2

y=2×4=8

So, number is 10x+y=10×2+8=28

Answer 2

Answer:

the two digit number in tens place it will be 120