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Aflati X din ecuatia :100[25-5(X-3)+2]:4=300

Răspuns :

=100[25-5(X-3)+2]=300*4
=100[25-5(X-3)+2]=1200
=25-5(x-3)+2=1200:100=12
=25-5(x-3)=12-2=10
=5(x-3)=25-10=15
=x-3=15:5=3
x=3+3
x=6