( 2x - 3y = -1 x = y + 1 solve the system of equations by substitution method , ) ( y = 6x - 11 -2x - 3y = -7 solve the system of equations by substitution method , ) ( y = -2 4x - 3y = 18 solve the system of equations by substitution method , ) ( y = -2x + 20 6x - 5y = 12 solve the system of equations by substitution method , ) ( x = -3y + 1 -3x - 3y = -15 solve the system of equations by substitution method , ) ( y= -2x + 9 5x - 2y = 18 solve the system of equations by substitution method , ) ( -7x + 8y = -5 x = 3y - 3 solve the system of equations by substitution method , ) ( y = 4x + 6 y + 5x = -21 solve the system of equations by substitution method , ) ( solve the system of equations by substitution method -3x - 8y = 20 y = 5x + 19 , ) ( solve the system of equations by substitution method 5x - 4y = -3 y = - 3x + 5 , ) ( solve the system of equations by substitution method -3x - 2y = -12 y = 5x - 7 , ) ( solve the system of equations by substitution method - 7x - 2y = -13 x = 2y + 11 , ) ( solve the system of equations by substitution method 3x - 8y = 245x - 3 = y , ) ( solve the system of equations by substitution method -3x + 6y = -12 y = 5x - 2 , ) |