найди уравнения ,решённые витей неправильно,и исправь их

768-х=200          

х=768+200

х=968

 

 

 

 y+200=419=190

y=200=609

y=609-200

y=409

 

c*2 =6*90

c*2=540

c=540:2

c=270

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