Solve the following equations by reduction method :
`2x + 3y = 9, y - x = -2`

Solve the following equations by reduction method : 2x - y = -2, 3x + 4y = 3

Solve the following equations by reduction method : x + y = 2, 3x + 2y = 5

Solve the following equations by the reduction method : x + 3y = 2, 3x + 5y = 4 .

Solve the following equations by reduction method : x - y + z = 4, 2x + y - 3z = 0 , x + y + z = 2

Solve the following equations by using reduction method : 2x - y + z = 1, x + 2y + 3z = 8, 3x + y - 4z = 1 .