What is true about the solution of x^2/2x-6=9/6x-18? x= +_ sqrt 3 and they are actual solutions. x= +_ sqrt 3 but they are extraneous solutions. x = 3, and it is an actual solution. x = 3, but it is an extraneous solution.

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?