Question

A number consists of two digits the digit at the tens place is twinc that of the digit at the units place if 18 is subtracted from the number the digit are reversed find the number​

Answer 1

Answer:

Step-by-step explanation:

let the no at units place be x

and digit at tens place be y

y = 2x

2x - y = 0  

10y + x -18  = 10x + y

9y - 9x = 18

y - x =2

y = 2 + x

substitute in first equation

2 + x = 2x

x = 2

y=4

the now is 42

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