What does this mean?? I’m not too sure it’s not for school or anything just curious

Please don’t try guessing what you think it is give me a straight answer

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Abird on top of a 200 ft bridge tower sees a man standing on the lower part of the bridge (which is 50 ft above the ground). the angle of depression from the bird is 26 ̊. how far is the man from the base of the bridge tower? with explanation and pictures .

Damon makes 20 cups of lemonade by mixing lemon juice and water. the ratio of lemon juice to water is shown in the tape diagram. lemon juice\text{lemon juice} lemon juice water\text{water} water how much lemon juice did damon use in the lemonade? cups