A number machine subtracts 4 from an input x and then doubles the result. Its output is 30. Which option correctly represents and solves this situation?

A rectangle has width x cm and length (x + 5) cm. Its perimeter is 50 cm. Which option gives the correct equation and width?

Each of 5 shelves holds x books and 3 magazines. After 4 items are removed, 46 items remain. Which option correctly represents and solves the situation?

A bus initially has 6 rows with x students in each row. At one stop, 9 students leave and 3 students join. There are then 42 students. Which option is correct?

A taxi fare consists of a fixed charge of 7 dollars and 4 dollars for each kilometre travelled. A coupon reduces the fare by 6 dollars, and the final fare is 29 dollars. If x is the distance travelled, which option gives the correct equation and distance?

A rope is cut into 3 equal pieces, each originally x cm long. Then 2 cm is trimmed from every piece. The combined remaining length is 30 cm. Which option correctly represents and solves the situation?

A number x is reduced by 3. The result is multiplied by 4, and then 5 is added. The final result is 41. Which option gives the correct equation and value of x?

Study the balanced scale in the figure. Which option gives the equation represented by the scale and the mass of one bag?

The figure shows a rectangular garden. Which option gives the equation represented by the measurements and the garden's width?