Предмет: Математика, автор: nellsvet

Выполни действия и найди неизвестное:
789+х=20×30+9
х-4340:10=897-203
(348+474)-х=40×20
х+13×50=847+925

Ответы

Автор ответа: Marisabel10061999
0
1)789+х=20×30+9
789+х=600+9
789+х=609
х=609-789
х=-180
2)х-4340:10=897-203
х-434=694
х=694+434
х=1128
3)(348+474)-х=40×20
822-х=800
х=822-800
х=22
4)х+13×50=847+925
х+650=1772
х=1772-650
х=1122
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