3^5=(1/3)^x

Help plz I think negative 5 but I’m not sure

Find three consecutive numbers such that the sum of one-fourth the first and one-fifth the second is five less than one-seventh the third

Abird on top of a 200 ft bridge tower sees a man standing on the lower part of the bridge (which is 50 ft above the ground). the angle of depression from the bird is 26 ̊. how far is the man from the base of the bridge tower? with explanation and pictures .

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length