Books  Books 11  11 of 11 on If equal numbers be added to equal numbers, the sums are equal numbers. That is,.... 
If equal numbers be added to equal numbers, the sums are equal numbers. That is, if a = b and c = d, then a + c = b + d, If a = b — c and x = p — g, then a + x = (b — c) + (p — q) = b +p — c — q. Elements of algebra priliminary to the differential calculus ...  Page 2 by Augustus De Morgan  1837  256 pages Full view 
