Решите уравнение:200x+160*(50-x)=9200
200x+160*(50-x)=9200 200x+8000-160x=9200 40x+8000=9200 40x=9200-8000 40x=1200 x=1200:40 x=30
200х+8000-160х=9200 40х=9200-8000 40х=1200 х=1200÷40 х=30