the length of a rectangle is 3 meters less than twice it’s width. write and equation to find the length of the rectangle

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

What statement is true? 2x^2-9x+2=-1