Question

4p - q = 27 -8p + 2q = -16 find the value p and q.

Answer 1

4p - q = 27                                   ..............1
 -8p + 2q = -16                            .............. 2

multiplying eq 1 by 2
8p + 2q = 45                                .................3

adding eq  and eq 2
 8p + 2q =  54  
-8p + 2q = -16  
--------------------------
       4q   =     38
        q    =     38/4

 putting the value of q in eq 2

-8p + 2q = -16  
-8p + 2* 38/ 4 =-16
-8p + 19 = -16
p           = - 35/ -8
p = 35/ 8