Question 1201754
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They want you solve this system of two equations in two unknowns

    P = 10 - 0.2Q    (1)
    P =  2 + 0.2Q    (2)


Since left sides are identical, right sides are equal

    10 - 0.2Q = 2 + 0.2Q

    10 - 2 = 0.2Q + 0.2Q

       8   =     0.4Q

       Q   =     8/0.4 = 80/4 = 20.


<U>ANSWER</U>.  Q = 20;  P = 10 - 0.2Q = 10 - 0.2*20 = 10 - 2*2 = 10 - 4 = 6.
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Solved.


Do the rest on your own.


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