12 and 3/10 more than 5 and 13/1000 of d equals 15 and 302/1000 12 and 3/10+(5 and 13/1000 times d)=15 and 302/1000 convert to improper fractions 12 and 3/10=123/10 5 and 13/1000=5013/1000 15 and 302/1000=15302/1000
123/10+(5013/1000 times d)=15302/1000 subtract 123/10 from both sides 123/10=12300/1000 (15302-123000)/1000=2698/1000 5013/1000 times d=2698/1000 multiply both sides by 1000/5013 to clear fraction d=2698/5013
