(9x-3)+(5x+5)+2(7x-15)=168 what is the value for x

What is the value of  y  in the solution to the system of equations? x  +  y  =  12x  –  3y  =  –30a. –8b. –3c. 3d. 8

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?