The perimeter of a parallelogram is 60 meters. the width of the parallelogram is 6 meters less than its length. find the length and the width of the parallelogram

Width=x-6
lenght=x
Perimeter of a parallelogram=2(lenght)+2(width)

Data:
Perimeter=60 m

Therefore:
2(x)+2(x-6)=60
2x+2x-12=60
4x=60+12
4x=72
x=72/4
x=18

Width=x-6=18-6=12
Lenght=x=18

the lenght would be 18 m, and the width 12 m

1.17+3.99a. you combine the terms with a to create 3.99 and the 1.17 stays because it has no like terms or a variable