Simplify.
6x - 6(бу - 5х) - Бу

Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.