Question

Calculati:
a)30:(1 supra10 - 1 supra 10 :3)

Answer 1

30:( 1/10-1/10:3)=
30:( 1/10-(1/10)/3)=
30:(1/10-1/30)=
30:((3-1)30) // Am amplificat cu 3
= 30:2/30=
30:1/15=
30•15=450

Answer 2

30:(1/10-1/10:3)=30:(1/10-(1/10)/3)=30:(1/10-1/30)=30:((3-1)30)=30:2/30=30:1/15=30 x 15=450
unde am pus x este ori