a) x - 2y = 5 - 2* -3 = 5 - (-6) = 5 +6 = 11
b) (x+y):4 = [5+ (-3) ]:4 = (5-3) :4= 2:4 =1/2= 0,5
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a) x - 2y = 5 - 2* -3 = 5 - (-6) = 5 +6 = 11
b) (x+y):4 = [5+ (-3) ]:4 = (5-3) :4= 2:4 =1/2= 0,5