Lindsay can paint 1/x of a certain room in 20 minutes. what fraction of the same room can joseph paint in 20 minutes if the two of them can paint the room in an hour, working together at their respective rates?

X=6 case if they were both painting it in 20 minutes x=3

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)