Ответ:
370+х=400•2
370+х=800
х=800-370
х=430
_______________________
900-z=130•5
900-z=650
z=900-650
z=250
_________________________
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Ответ:
370+х=400•2
370+х=800
х=800-370
х=430
_______________________
900-z=130•5
900-z=650
z=900-650
z=250
_________________________