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va rog rezolvati e urgent. (x:6-528)+307=517 si 909:9-(9x9:x-9)=101

Răspuns :

(x:6-528)+307=517
=x/6-528+307=517
=x/6-221=517
x-1326=3102
x=1326+3102
x=4428

909:9-(9x9:x-9)=101
=101-( 9x9/x -1 ) =101
=( 81/x -9)=0
9x=81
x=9