intermediate algebra
posted by TB .
solve using the substition method. show your work. if the system has no solution or an iniinite number of solutions, state this 18x+6y=78
12x+54y=48

3x + y = 13
so, y = 13  3x
2x + 9y = 8
2x + 9(13  3x) = 8
x = 5
so, y = 2