X/5-g=a for x ,solve . can someone solve as well as explain the process of these equations

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?

Find the value. a. 0.003 b. 0.03 c. 0.3 d. 3

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side then from the larger side of the rectangle. the perimeter of the rectangle is equal to 56 cm. find the lengths of the sides of the rectangle. 16 points answer quick