let x- unit digit
2x + 1- twice the tens by one
x + 2x +1 = 10
x + 2x = 10 - 9
3x= 9
x = 3
therefore : x = 3
2x + 1 = 7
the number is 37.
you can try checking it:
x + 2x + 1 = 10
3 + 2(3) = 10-1
3 + 6 = 9
9 = 9
The units digit of a two digit number exceeds twice the tens digit by 1. Find the number if the sum of its digits is 10.
18 is the only number that matches these criteria.
2.3
The number is 84.Assign the digits in the number the letters a and b.GIVEN: a + b = 12GIVEN: a = 2bSolve for b, then solve for a.2b + b = 123b = 12b = 4a = 2(4) = 8
9218 9425
The units digit of a two digit number exceeds twice the tens digit by 1. Find the number if the sum of its digits is 10.
362x(3x6)
It is 99,887,765
804
18 is the only number that matches these criteria.
17
2.3
22621, 44742, 66863, 88984
47 Impossible problem!
The number is 84.Assign the digits in the number the letters a and b.GIVEN: a + b = 12GIVEN: a = 2bSolve for b, then solve for a.2b + b = 123b = 12b = 4a = 2(4) = 8
9218 9425
None. The sum of one digit can't be twice the size of the digit.