Twelve and three tenths more than five and thirteen thousandths of a number d is equal to fifteen and three hundred two thousandths. what is the value of d?

We will first translate this word problem into numerical expression.
Twelve and three tenths more than five and thirteen thousandths of a number d is equal to fifteen and three hundred two thousandths can be written into this form;
               5.013d + 12.3 = 15.302
We can now solve for d,
Add -12.3 to both sides of the equation
               5.013d + 12.3 - 12.3 = 15.302 - 12.3
                             5.013d = 3.002
Then, divide both side of the equation with 5.013
                     5.013d / 5.013 = 3.002 / 5.013
                                     d = 0.60

Therefore, the value of d is 60 hundredths or 0.60.