If de =6x-7 and ae =4x+9 . fund x and db

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

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?

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square