2(x − 4) = −22

i know x is -7, but i need to know how i get it.

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answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

unless if u could do my questions, if not i wouldn't want to