Question

Solve d/7 + 3/10 = 8. Write your answer as a mixed number.

What is d?

Answer 1

d = 53.9
hope this helps:)

Answer 2

53
`(9)/(10)`

Subtract
`(3)/(10)` from both sides.


`(d)/(7)` +
`(3)/(10)` -
`(3)/(10)` = 8 -

`(3)/(10)`

Then simplify.


`(d)/(7)` +
`(3)/(10)` -
`(3)/(10)` =
`(d)/(7)`

8 -
`(3)/(10)` =
`(77)/(10)`


`(d)/(7)` =
`(77)/(10)`

Now Multiply both sides by 7


`(7d)/(7)` =
`(77 x 7)/(10)`

Lastly simplify.


`(7d)/(7)` = d


`(77 x 7)/(10)` =
`(539)/(10)`

d =
`(539)/(10)`


Good luck! (: