Answer:
x = 2
Step-by-step explanation:
I just chucked it into Wolfram Alpha and it showed me x = 2
also for more proof, insert positive 2 in both x's
For this case we must factor the following expression:

We rewrite the middle term as a sum of two terms whose product is

And whose sum is

These numbers are:
-5 and -3
So:

We factor the maximum common denominator of each group:
We take common factor

Answer:

Y=x-2
..........................
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The probability that pitcher will throw no more than 16 strikes is 0.1938.
6x+12y-6z+7x7y-28z= 13x+19y-34z