The phrase "adequately to replace" is correct and usable in written English.
It can be used when discussing whether something is sufficient or suitable to serve as a substitute for something else.
Example: "The new software is designed adequately to replace the outdated system we have been using."
Alternatives: "sufficiently to substitute" or "effectively to take the place of".
Monty Panesar and Scott Borthwick were each given a single Test to stake their claim to Swann's place in the long term, but neither truly convinced that they were adequately equipped to replace England's best spinner in a generation.
Luis Suarez was already on his way to Anfield but the club felt another striker was needed to replace Torres adequately and the first public murmurs of a possible move for Newcastle striker Carroll emerged in the early hours of 31 January.
If Moscow lets the cooperative program lapse, it needs to replace it with adequately financed Russian programs.
The changing nature of our economy and society has compelled more and more of us to travel by rail, but the failure to replace rolling stock adequately has left us ever more crammed together in overcrowded carriages.
The idea is for employers to fill slots for which adequately trained Americans aren't available, not to replace existing workers with cheap foreign labor.
The most frequent criticism has been that the workers brought to the island to replace the striking workers have not been adequately screened and do not have sufficient training to handle an emergency.
A Texas jury last year ruled that Baker Botts hadn't adequately explained the risks of such multiple representations and ordered the firm to replace the $65 million that Cailloux gave away to the foundation.
It could take anywhere from 9 to 13 quarts of transmission fluid to adequately replace the entire transmission fluid.
"Given the relative size of the UK market compared to the EU and US markets, and its alignment with EU rules at the point of exit, the government will need to work in partnership with the EU to achieve that goal — again underlining the need to adequately replace existing structures for policy coordination".
