The perimeter of a rectangle is 58 cm. The length is 4x cm, and the width is 9 cm. Find the value of x and write out an equation that you could set up to solve for x.
to solve perimeter, you need to add all sides. so, you would do 4x + 4x + 9 + 9=58. next you combine like terms, and you would get 8x+18=58. next, subtract 18 to get x by itself. this would be 8x=40. next step, divide by 8.
