Answer: The Last option is the only option equivalent to that equation.
This is the symmetric property, for you divide 9 to both sides to get x, instead of adding (addition property of equality)
So symmetric property should be your answer
Hope this helps
<h2>

</h2><h2>Option C</h2>
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The number of throws that the player make X follows binomial distribution.
The probability that the player makes x throws out of eleven throws is

The probability that the player makes at most nine out of eleven free throws
is

Correct choice is (B).
The equation is 2x+3=7
2x +3=7
-3 -3
2x=4
divide both sides by 2
x=2
the answer is 2