I am a number between 149,900 and 150,000. My tens digit is 7 more than my ones digit. The sum of my tens and ones digits is 9. What number am I?
2006-09-27 16:33:00 · 5 answers · asked by Mrs. Butler ♥2 B♥ 5 in Education & Reference ➔ Homework Help
149,981
2006-09-27 16:36:03 · answer #1 · answered by JT 4 · 1⤊ 0⤋
let your ones digit be x
then your tens digit would be x+ 7
then the sum of tens and ones digits is x+(x+7) = 9
==> 2x + 7 = 9
2x = 9 - 7
2 x = 2
==> x =1
So ones digit is 1 and tens digit is 1+ 7 = 8
The number is 149,981
2006-09-28 10:31:19 · answer #2 · answered by help563 2 · 0⤊ 0⤋
Use the second and third sentences to write two equations
t = 7 + o
t + o = 9
Substitute 7 + o for t in the second equation.
7 + o + o = 9
7 + 2o = 9
2o = 2
o = 1
t = 8
So the number would be 149,981
2006-09-27 23:38:53 · answer #3 · answered by PatsyBee 4 · 1⤊ 0⤋
149,981
2006-09-27 23:38:39 · answer #4 · answered by bruin2bin2012 2 · 1⤊ 0⤋
Can you PLEASE help me
2006-09-27 23:44:06 · answer #5 · answered by laney45 4 · 0⤊ 2⤋