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Рівняння

QuestionAnswer
– 2 х = 16 -8
2(х – 6) + 4 х = 5х – (8 – х); немає коренів
3(x+12)=0. -12
8x+16=0 -2
Екскурсанти за день пройшли 17,2 км. Зранку вони йшли 4 години, а після обіду ще 2 години. Скільки кілометрів екскурсанти пройшли вранці, якщо після обіду їх швидкість знизилася на 1 км / год. З якою швидкістю йшли екскурсанти вранці? Екскурсанти вранці пройшли 12,8 км зі швидкістю 3,2 км/год.
3(6 + 7х) – 10х = 2(4+3х) + 15 1
3(х + 4) +6(11 – х) = 9 23
Created by: user-1988788
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