Higher mmr than my league / Will i jump a whole league ¿?

Im currently Silver 3 in promos for Silver 2, im currently 18 wins and 2 losses in my last 20 games. Ive just checked my mmr online and it sais my mmr is Gold 5, 1471 . ¿¿¿ If i win my promos will they put me directly put me in gold 5 ? or will i just have to carry on climing the ladder like normal even tho i should be 3 divison infront acording to my mmr. Thanks for the help :) <3
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