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35 = ((x-5)*(x-14))/2 // - ((x-5)*(x-14))/2
35-(((x-5)*(x-14))/2) = 0
(-1*(x-5)*(x-14))/2+35 = 0
(-1*(x-5)*(x-14))/2+(2*35)/2 = 0
2*35-1*(x-5)*(x-14) = 0
19*x-x^2 = 0
19*x-x^2 = 0
x*(19-x) = 0
19-x = 0 // - 19
-x = -19 // * -1
x = 19
x*(x-19) = 0
(x*(x-19))/2 = 0
(x*(x-19))/2 = 0 // * 2
x*(x-19) = 0
( x-19 )
x-19 = 0 // + 19
x = 19
( x )
x = 0
x in { 19, 0 }
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