<PRE><B>Question 260874</B>
1)  2p + 3q = 18
2)  5p - q =  11   multiply by three so that the number of qs are equal
3) 15p - 3q = 33   add equations 1 and 3
   17p     = 51
    P = 3
Substitute 3 for p in equation 1) 
 6 + 3q = 18
so 3q = 12
q =  4
Checking in equation 2)
LHS  5 x 3 - 4 = 11  RHS = 11
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