solve the system x+6y=24, -6x+5y= -21
I would use substitution
form the 1st ----> x - 24-6y
into the 2nd:
-6(24-6y) + 5y = -21
solve for y, then sub that back into x = 24-6y
form the 1st ----> x - 24-6y
into the 2nd:
-6(24-6y) + 5y = -21
solve for y, then sub that back into x = 24-6y