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420-(458-1000:X)+24*7=180

Răspuns :

CosmoteRo
420-(458-1000:X)=180-168
420-(458-1000:X)=12
458-1000:X=420-12
458-1000:X=408
1000:X=458-408
1000:X=50
X=1000:50
X=20

420-(458-1000:x)+24•7=180|-420

-(458-1000:x)+168=-240|-168

-(458-1000:x)=-408|•(-1)

458-1000:x=408|-458

-1000:x=-50

x=20



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