Pleaseee help me answer this question

Me. i can't figure out this question. give an explanation too. .

(x-5)1/2+5=2 what is a possible solution?

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.