A First Course in Linear Algebra · Problem SSLE.C50
Systems of Linear Equations — Robert Beezer
Mathematics — Linear Algebra · solving-systems-of-linear-equations
Problem
A three-digit number has two properties. The tens-digit and the ones-digit add up to 5. If the number is written with the digits in the reverse order, and then subtracted from the original number, the result is 792. Use a system of equations to find all of the three-digit numbers with these properties.