In the manner If a=b=1=ab=bc. & x=0,2=be. The calculatio
is as followeth
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The summe of these two summes is Equall to ye
Area dbfc, supposing ad=0.8. And their Difference is equall to ye
area bche, supposing ae=1,2. & 1=ab=bc∥df∥he. [that is]
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[illeg] such respect to ye
superficies bcfd[,] bche
[
ye
numbers]
[illeg]
[(viz as ye
lines ad]
[illeg]
[illeg]
[illeg]
[illeg]