<PRE><B>Question 817707</B>
10b + a = N
10a + b = N + 27
10a + b - 27 = N
---
a + b = 13
a = 13 - b
---
10b + a = 10a + b - 27
9b = 9a - 27
9b = 9(13 - b) - 27
9b = 117 - 9b - 27
18b = 90
---
b = 5
a = 8
---
N = 58
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Convert fractions, decimals, and percents:
https://sooeet.com/math/fraction-decimal-percent.php
---
Calculate and graph the linear regression of any data set:
https://sooeet.com/math/linear-regression.php</PRE>