<PRE><B>Question 824687</B>
---
x = units digit
y = tens digit
---
(x + 10y)/(x + y) = 4/1
x = 2y
---
put the system of linear equations into standard form
---
x + 10y = 4(x + y)
x - 2y = 0
---
x + 10y = 4x + 4y
x - 2y = 0
---
3x - 6y = 0
x - 2y = 0
---
copy and paste the above standard form linear equations in to this (matrix method) solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
---
answer:
This linear system is singular. It has no solution
---
solve with the elimination method:
---
3x - 6y = 0
x - 2y = 0
---
3x - 6y = 0
-3x + 6y = 0
---
add the system:
0 = 0
answer:
This linear system is singular. It has no solution
NOTE: matrix method and elimination method agree (the system is singular, no solution.)
---
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
---
Solve systems of linear equations up to 6-equations 6-variables:
https://sooeet.com/math/system-of-linear-equations-solver.php</PRE>