the ones digit of a two digit number is one less than the tens digit. one half the sum of the ones digit and double the tens digit is 13. find the number

Question

this is a math equation........ There is no deicription

 

Answer 1

hd  the number. 

h-1=d, and 1/2*(d+2h)

 

simple. h is 9 and d is 8. 

 

So, answer is 98.