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determinati numarul x daca 4% din x egal cu
A) 100
B) 60
C) 1
D) 12
E) 4
F) 9

Răspuns :

A)
4x/100=100
4x=100*100
4x=10000
x=10000:4
x=2500

B)
4x/100=60
4x=100*60
4x=6000
x=6000:4
x=1500

C)4x/100=1
4x=100*1
4x=100
x=100:4
x=25

D) 4x/100=12
4x=100*12
4x=1200
x=1200:4
x=300

E) 4x/100=4
4x=100*4
4x=400
x=400:4
x=100

F) 4x/100=9
4x=100*9
4x=900
x=900:4
x=225

* - etse inmultire
/ - supra, sau impartit


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