I need help with these perimeter problems.

1) x-2+x-2+x-2= 294
2) 3x+3x+x+x=1000
3) x-6+x-6+25= 143
4) The perimeter of a rectangle is 234 meters. The rectangle is twice as long as it is wide. What are its length and width?
5) Zelda has a 300-inch roll of binding for a quilt. The quilt must be 84 inches long. How wide can she make it?
Please answer these problems and explain to me how you solved them.