Solve for d
d = \frac{13}{10} = 1\frac{3}{10} = 1.3
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d=\frac{7}{10}+\frac{3}{5}
Add \frac{3}{5} to both sides.
d=\frac{7}{10}+\frac{6}{10}
Least common multiple of 10 and 5 is 10. Convert \frac{7}{10} and \frac{3}{5} to fractions with denominator 10.
d=\frac{7+6}{10}
Since \frac{7}{10} and \frac{6}{10} have the same denominator, add them by adding their numerators.
d=\frac{13}{10}
Add 7 and 6 to get 13.
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