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Afla nr.. Necunoscut
X:2+(105-275:11):4=8


Răspuns :

x:2+(105-25)=8x4
x:2+80=32
x:2=32-80
x:2=--48
x=-48x2
x=-96
x:2+(105-275:11)=8•4
x:2+(105-275:11)=24
x:2+105=25+24
x:2+105=49
x:2=105-49
x:2=56
x=56•2
x=112

Vr coroana