Question

1.) 2x + y = 3
2.) x - 2y = -1
If equation 1 is multiplied by 2 and then the equations are added, the result is
3x = 2
3x = 5
5x = 5

Answer 1

5x=5
If it was any other solution, the equations would'nt make sense

Answer 2

5x=5 if it was any other solution, the equation woluld not make sense.