be0ckie3syoujennaro
be0ckie3syoujennaro be0ckie3syoujennaro
  • 19-10-2016
  • Mathematics
contestada

The tens digit of a two digit number excedds the unit digit by 5 . if they are reversed b the new number is less by 45. if the v sum of their digits is 9 find the numbers

Respuesta :

apologiabiology
apologiabiology apologiabiology
  • 25-10-2016
x and y  are digts
x is tens y is ones

x=y+5

10y+x=10x+y-45
x+y=9


we have
x+y=9
x=y+5
sub
y+5+y=9
2y+5=9
minus 5
2y=4
divide 2
y=2

sub back
x=y+5
x=2+5
x=7

the number is 72

Answer Link

Otras preguntas

one number is 6 more than another.  Their product is is 520.  Find the numbers
What is 32 over 48 simplified and with what numbers
Where are most faults located? And what is a fault in science terms?
one number is 6 more than another.  Their product is is 520.  Find the numbers
a population decrease from 404 million to 288 million .which of the following is the percent decrease of the population
a population decrease from 404 million to 288 million .which of the following is the percent decrease of the population
how many stars are there in america's flag ?
how many stars are there in america's flag ?
Where are most faults located? And what is a fault in science terms?
How do you do y divided by 9=12?