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pls acum urgent coroana ex 6

Pls Acum Urgent Coroana Ex 6 class=

Răspuns :

a-1.070=b
b+2.050=c
c-729=7.749

c=7.749+729
c=8.478

b=8.478-2.050
b=6.428

a=6.428+1.070
a=7.498
[(a-1070)+2050]-729=7749
(a-1070)+2050=7749+729
a-1070=8478-2050
a=6428+1070
a=7498