Question 51208
#39. 5t+3+2t-6t=4+12 
     5t+2t-6t  = 16-3
           t   = 13 

#45. 5/7x + 1/3 = 2/5 - 2/7x + 2/5
      5/7x+2/7x = 2/5-1/3+2/5
          7/7x  = (6-5+6)/5
             x  =  7/5
 
#55. -2(8p+2)-3(2-7p)-2(4+2p)=0
      -16p-4-6+21p-8-4p= 0
        -16p+21p-4p   = 4+6+8   
              p       = 18

#58 some thing wrong as there is no equal sign


To solve these kinds of problems U must move the algebrical stuffs to one side and the the numerical values to the other side of equal sign. remember to move one side to other side U must chage the sign like positive to negative.
and is P- represents positive and N represents negative then

         P*P=P
         N*N=P
         N*P =N
         P*N = N