Answer:
[tex]a. \\ 2x + 3y = 5 \\ x + y = 2 - - - \: y = 2 - x \\ 2x + 3(2 - x) = 5 \\ 2x + 6 - 3x = 5 \\ - x = - 1 \\ x = 1 \\ \\ y = 2 - x \\ y = 2 - 1 \\ 1[/tex]
solution (1, 1)
b.
[tex]2x - y = 4 - - - > y = 2x - 4 \\ 10 x - 5y = 3 \\ 10x - 5(2x - 4) = 3 \\ 10x - 10x + 20 = 3 \\ 0x = - 17[/tex]
no solution
equations are parallel.
