Answer:
d<100
Step-by-step explanation:
So to make d by itself u have to add or subtract or multiply or divide any of the other numbers to get d by itself. So to do that, u start off of adding 2 to both sides of the equation. After that, u get 1/4d < 20. Then u multiply 4/1 (yes the opposite of 1/4) on both sides. 4/1 × 1/4 cancels out and u are left with d. Now u do it on the other side. 20 × 4/1 equals 100/1 which is 100. So the answer is then d<100.
