Can someone show me how to isolate the “n” variable

What value of x is in the solution set of 4x - 12 s 16 + 8x? -10 -9 -8 -7

What is the volume of a cone with a height of 6 cm in the radius of 2 cm

What is the probability of throwing several dice with sum equal to 6 (six)? show the ways of possibilities for sum 6 (as the numerator) and the ways of throwing n dices for n = 1, 2, 3, 4 or 5 as denominator for all the questions to earn full credits. (a)throw one die, (b) throw two dice, (c) throw three dice (d) throw 4 dice, (e) throw 5 dice