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aflati pe x din egalitatile: 100×(x+5)=900

Răspuns :

x+5=900:100
x+5=9
x=9-5
x=4

V:100x(4+5)=100x9=900
100*(x+5)=900
x+5=900:100
x+5=9
x=9-5
x=4