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(13x - 8y= 30) (14)
= - 182x + 143y = - 377 remplazamos en la segunda ecuación: 13x - (8*1.3) = 30
+182x - 112y = +420 13x - 10.4 = 30
_____________________ 13x = 30 + 10.4
/ 31 y = + 43 x= 40.4/13
y = 43/31 x= 3.1
y = 1.3
comprobamos en la primera ecuación:
14x - 11y = 29
(14*3.1) - (11*1.3) =29
43,4 - 14,3 = 29