-6(y+15) = -3y+6 What value of y makes the equation true?

Which of the following expressions are equivalent ?

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4