Question

prove that the lines y=5x+7 and 2y=10x+5 are parallel​

Answer 1

Theorem

$\frac{a1}{a2} = \frac{b1}{b2} \: not \: equal \: to \: \frac{c1}{c2}$

As

1/2 = 5/10 ≠ 7/5

Hence they must be parallel lines