Jeremy E. answered 02/03/19
Mathematics, Programming, Physics, Automation, and Guitar
P = 2*w + 2*L
simply break the sentence up
(the perimeter of a rectangle) if (the width is w) centimeters and the( length is (10 less) than (twice the width))
P = 2*w + 2*( (-10) + 2*w)
P = 2*w + 2*( 2*w - 10)