Question 69283
2q = 7 - 5p
 4p - 16 = q
--------------
Rearrange:
1st: 5p+2q=7
2nd: 4p-q=16
---------------
Multiply 2nd by 2 to get:
3rd: 8p-2q=32
Add 1st and 3rd to get:
13p=39
p=3
------------
Substitute that into 2nd to get:
4*3-q=16
q=-4
------------
Solution: p=3; q=-4
Check in 1st: 5p+2q=7
5*3+2*-4 = 7
7=7
===================
Cheers,
Stan H.