Here are the equations of five straight lines.
Line P: y=12x+3\displaystyle y = \frac{1}{2}x + 3y=21x+3 Line Q: y=2x−4y = 2x - 4y=2x−4 Line R: 2y=x+102y = x + 102y=x+10 Line S: 2y+x=62y + x = 62y+x=6 Line T: y=−2x+5y = -2x + 5y=−2x+5
Two of these lines are parallel. Write down the two parallel lines.