Given: Two equations, x + 2y = 3

⇒ x + 2y – 3 = 0 - - - - (1)

2x + 4y + 7 = 0 - - - - (2)

We know that the general form for a pair of linear equations in 2 variables x and y is a₁x + b₁y + c₁ = 0

and a₂x + b₂y + c₂ = 0.

Comparing with above equations,

we have a₁ = 1, b₁ = 2, c₁ = - 3; a₂ = 2, b₂ = 4, c₂ = 7

Since

∴Both lines are parallel to each other.