TAKOBOTO

Coupled with, together with
In many countries, water and air polution is coupled with progressive environmental destruction
といっしょになって

Add formation 

おおくのくにぐにでは、みずやくうきのおせんとあいまって、かんきょうはかいがすすんでいる

In many countries, water and air polution is coupled with progressive environmental destruction

じつりょくとうんとがあいまって、かれをせいこうにみちびいた。

His ability coupled with luck brought about his success.

そのゲームはかわいいキャラクターとみりょくてきなストーリーがあいまって、おおくのユーザーにしじされたヒットさくひんとなった。

That game featured cute characters coupled with a charming story, so it became a big hit supported by many users.

のしどうりょくとせんしゅのやるきがあいまって、ゆうしょうできた。

The coach's leadership abilities coupled with the player's motivation lead to the victory

Ref # Kanzen Master Level 1 - p40 - no.36

LR

{NOUN1} + {と} + {NOUN2} + (と) + {が} + {相まって} is a frequent pattern.
実力と運とが相まって、彼を成功に導いた。
(His ability coupled with luck brought about his success.)

LR