Find the equation of tangent to the curves `(x^2/9)+(y^2/16) = 1` which is parallel to x-axis.

Find the equation of tangents to the curve 4x^2-9y^2=1 which are parallel to 4y=5x+7.

Find the equation of the tangent to the curve y=3x^2 at (1,1)

Find the equation of the tangent to the curve x^2 + 3y = 3 , which is parallel to the line y - 4x + 5 = 0

Find the equation of the tangent to the curve: y = x^2 - 2x + 9 , which is parallel to the line: 2x + y + 7 = 0