Which of the following formulas is used to calculate the probability of independent events a and b?
a. p(a ∪ b)=p(a)+p(b)
b. p(a ∪ b)=p(a)·p(b)
c. p(a and b)=p(a)+p(b)
d. p(a and b)=p(a)·p(b)

x= -3

step-by-step explanation:

step 1: simplify brackets

4 - x - 1 = 6

step 2: simpilfy

3 - x = 6

step 3: subtract 3 from both sides

-x = 6 - 3

step 4: simpilfy 6 - 3

-x = 3

step 5: multiply both sides by -1

x = -3