the parallel line is 2x+5y+15=0.
 
 
Explanation:
ok I hope it will work 
soo,
Solution
 given,
 given parallel line 2x+5y=15 
 which goes through the point (-10,1) 
 now,
 let 2x+5y=15 be equation no.1
 
then the line which is parallel to the equation 1st
 2 x+5y+k = 0 let it be equation no.2
now the equation no.2 passes through the point (-10,1)
 or, 2x+5y+k =0
 or, 2*-10+5*1+k= 0
 or, -20+5+k= 0
 or, -15+k= 0
 or, k= 15
putting the value of k in equation no.2 we get,
 or, 2x+5y+k=0
 or, 2x+5y+15=0
which is a required line.