Another two step equation ... 1/3y+1/4=5/12
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Cd is equal to this: first calculate AB by sin30 which is radical 3 then by sin45 you know bc is radical 3 too then by fisaghures ( idk what you call it)
calculate bd at the end you just gotta do this: bd-bc
calculate bd at the end you just gotta do this: bd-bc