6d
If -6d = 42 then 6d = -42. then divide by 6, d = -7
Three Shillings and Sixpence (3/6d) GBP in 1818 had the purchasing power of about £9.38 GBP today. NOTE - This historical conversion is the result of many calculations and considerations by a purpose designed program for which I can take no credit. The resulting answer should only be regarded as an approximation.
-6d = -42-6(7) = -42d = 7
72-6d=6 subtract 72 from both sides -6d=66 divide by -6 d=-11
yes you can
9d-19=6d+2 ... add 19 to both sides and subtract 6d from both sides... 9d-6d=2+19 3d=21 d=21/3 d=7
The pressure test for API 598 is slightly less pressure and less duration than API 6D. API 6D is specifically for pipeline valves.
API 6D exceeds API 598 in both pressure and duration.
6d = c Divide both sides by 6: d = c/d
The cost of fish and chips in 1960 would have varied depending on the location, quality of the ingredients, and the specific establishment selling them. However, on average, a serving of fish and chips in 1960 would have likely cost around 2 shillings to 2 shillings and 6 pence in the United Kingdom. It's important to note that inflation and changes in the economy over the years would make it difficult to provide an exact equivalent in today's currency without more specific information.
3c - 4d = 6d + 4c Subtract 4c from both sides: -c - 4d = 6d Add 4d to both sides: -c = 10d or c = - 10d