Answer:
53. ±6
51. 2
Step-by-step explanation:
According to the Order of Operations [GEMS\BOMDAS\PEMDAS etc.], in this case, evaluate everything in grouping symbols first, then evaluate the exponents to avoid confusion:

I am joyous to assist you anytime.
You would distribute -4(3 - 5x) into looking like:
-12 +20x
This gives you
-12 + 20x ≥ -6x + 9