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# Title: [De la Methode de l'Universalite] De la Méthode de l'Universalité (shelfmark LH IV, V, 10)
# Folio [48]r, page id 00066634:0095
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21 Junii 4
duce
sit + X
um
Is.. .. + f
LCX
+ fX - b.
pare Analybica.
, facit plus:
Ajo esse  aequa
ropositio
a
posita X aequ. b.
+bf.
ajo esse C aequ + bc.
Demonstratio:
Nam quia X aequ. b. erit X - b aequ. 0.
saequale
ergo X - b in
f - c dabit a. (quia si nihilo ducatur in quidvis,
erit nihilo aequale). Ergo Est autem X - b in f-c idem
quod
fX = cX - b f. O, ut ostendimus; ergo fiet
+ fX - C X - bf. O, aequ. 0.
seu quod idem est fiet
O aequ. CX + bf = f X. Rursus quia X aqu. b,
 b fiet ...  f X aequ. BR + bf
linc
hinc
item.
cursus quia
 aj es bC ex
+bC aequ. +cX
item fiet....
Ergo aequalibus addendo aequalia siet + fX + bc aequ. CX + bf
pauo ante
Ergo + bc aequ. +cx + bf - f x. sed supra. Derat
etiam oqu. +CX + bf - fX. ergo erit C aequ. + bc
quod in emate demonstrandum proponebatur
Demonstratio
minus
in
Quod
vot