MATH SOLVE

5 months ago

Q:
# The tens digit of a certain number is five more than the units digit. The sum of the digits is 9. Find the number.

Accepted Solution

A:

the tens digit = n

the units digit = n-5

n + n-5 = 9

2n = 9+5

2n = 14

n = 7 ← the tens digit

the units digit = n-5 = 7 - 5 = 2

the number is 72

the units digit = n-5

n + n-5 = 9

2n = 9+5

2n = 14

n = 7 ← the tens digit

the units digit = n-5 = 7 - 5 = 2

the number is 72