Автор - Lolomiwka

х+320=80·7 х-180=240:3 400-х=275+25

Ответ

Автор - Vavui14
x+320=80*7
x+320=560
x=560-320
x= 240
____________

x-180=240/3
x-180=80
x=180+80
x=260
____________

400-x=275+25
400-x=300
x=400-300
x=100

Ответ

Автор - OlyaSara
х+320=80*7
х+320=560
х=240

х-180=240:3
х-180=80
х=260

400-х=275+25
400-х=300
х=100

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