URGENT pls help I literally don’t understand how to do this

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

Kendra had twice as much money as kareem. kendra later spent $8 and kareem earned $6. by then,the two had the same amount of money. how much money did each have originally?

Solve the following simultaneous equation by using an algebraic method (either substitution or elimination) 2x + 3y=-4 4x-y=11