Question 1107671
Variables standing for their names,


{{{system(c=p-2,p=j-6,c+j+p=40)}}}
Solve the system.


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{{{system(c=p-2,j=p+6)}}}


Substitute for those:

{{{(p-2)+(p+6)+p=40}}}-------one equation in just ONE unknown, p.

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