Question

What is the solution to the system of linear equations? 2x-y=7 y= 2x+3

Answer 1

Hi !

$\begin{cases}2x-y=7\\y=2x+3\end{cases}\\\\2x-(2x+3)=7\\2x-2x-3=7\\\\-3=-7$

There is no solutions !

Answer 2

2x-y = 7
-2x+y = 3

0 = 10

No solution!