3х+7х+5х=150
15х=150
х=10.
3*10=30; 7*10=70; 5*10=50
Ответ: 30; 70; 50.
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3х+7х+5х=150
15х=150
х=10.
3*10=30; 7*10=70; 5*10=50
Ответ: 30; 70; 50.