Yis directly proportional to x, and y=216 when x=2. find y when x=7

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

If 5x - 2 = -12, then x = a) -50 b) -4.4 c) -2.8 d) -2

Aley is at the store buying some supplies for an art project. she decides to buy some colored pencils for $3.95 and a drawing tablet. the total cost of the supplies before sales tax is $6.94. what is the cost of the drawing tablet? $10.89 $2.99 $1.76 $3.01