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a-2b+2c= 6-2*6+2*6=-6
4b-2a-8c= 4*6-2*6-8*6=24-12+48=60
a-2b+2c wynosi 6.
a = 4
b = 1
c = 2
podaj dla tych samych liczb wartość wyrażenia :
4b-2a-8c = -2a+4b-8c
-2*4 + 4*1 -8*2 = -8+4-16 = -20