1÷5 (45y+20)+3÷4 (12y=24)=19

Find solution set
(9y=14)+(9y=18)=19
18y = 33÷8

I am going out on a limb here and guess that for the first one you mean:

(45y+20)/5 + (3/4)(12y+24) = 19 , ... the + and = are on the same key on a keyboard, thus typos can happen

9y + 4 + 9y + 18 = 19
18y = -3
y = -1/6

your 2nd last line would be mathematical jibberish.