2 10+20y/7 +11y=43
10+20y+77y=301
Пошаговое объяснение: 10+97y=301
97y=301-10, 97 y=291 , y=3 7x-4(3)=2, 7x-12=2, 7x=12+2, 7x=14, x=2
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2
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10+20y/7 +11y=43
10+20y+77y=301
Пошаговое объяснение: 10+97y=301
97y=301-10, 97 y=291 , y=3 7x-4(3)=2, 7x-12=2, 7x=12+2, 7x=14, x=2