Find the equation of a straight line perpendicular to the line 2x + 5y + 7 = 0 and with y-intercept -3.

Find the equation of a straight line perpendicular to the line 3x - 4y + 12 = 0 and having same y-intercept as 2x - y + 5 = 0.

Write down the equation of the line perpendicular to 3x + 8y = 12 and passing through the point (-1, -2).

(i) The line 4x - 3y + 12 = 0 meets the x-axis at A. Write down the coordinates of A.

(ii) Determine the equation of the line passing through A and perpendicular to 4x - 3y + 12 = 0.