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Daca in doua lazi sunt 90 kg de mere cate kg de mere sun in 10 lazi de acelasi fel

Răspuns :

2 lazi------------- 90 kg 90:2=45 kg/lada

10 lazi------------------ x

x=10x90 :2=900:2=450 kg

2 lazi...............90 kg mere
10lazi..............x mere
sunt direct proporționale
facem 2supra 10=90supra x
facem2•xsupra 10•90
2•x supra 900
x=900:2
x=450 kg mere