How do you get 8(c-9)=6(2c-12)-4c

Without graphing the linear functions, find the coordinates of the point of intersection of their graphs: y=3x−11 and y=4

Florence price's brownies and more sells all types of cookies and pastries. on tuesdays, they markdown all brownies 75% to a sale of $1.50 a dozen. find the selling price and the markdown of a dozen brownies.

What is the measure of angle x? answer