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a fost răspuns

rezolvati ecuatiile:
b)92+56:(14-y)=100
c)(z:9)*15-47=28

Răspuns :

Ak000
b) 92+56:(14-y)=100 =>
=> 56:(14-y)=100-92 =>
=> 56:(14-y)=8 =>
=> 14-y=56×8 =>
=> 14-y=448 =>
=> -y=448-14 =>
=>-y=434 => y=-434

c) (z:9)×15-47=28 =>
=> (z:9)×15=28+47 =>
=> (z:9)×15=75 =>
=> z:9=75:15 =>
=> z:9=5 =>
=> z=9×5 => z=45