I do not understand this math

Answer:
D< (or equal to) 4
Step by Step:
subtract two from 1 then multiply by -4 and since its a negative the sign flips.
this is an inequality
Answer:
d is greater than or equal to 7
Step-by-step explanation:
step 1: multiply -4 by 2 to get rid of the fraction
step 2: you have d-6 is greater than or equal to 1
step 3: add 6 to 1 to isolate d
step 4: you have d is greater than or equal to 7