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Розв'яжіть систему рівнянь {3ху+х=-16 {3ху+у=-21 Смотреть ответ ArthurFirst ArthurFirst Ответ:x=2;8/3y=-7/3; -3Объяснение:{3ху+х=-16{3ху+у=-213ху+х -3ху-у=21-16x-y=5x=y+53(y+5)у+у=-213y^2+15y+y=-213y^2+16y+21=0 D=16^2-4×21×3=4 y=(-16±2)/6=-7/3; -3 x=y+5 x=2;8/3 Новые вопросы в Алгебра Знайдіть номер члена арифметичної прогресії 8,2; 7,9; 7,6; ..., який дорівнює 3,1. Туристи пройшли 24 км, причому 3 години вони піднімалися вгору, а 2 години- спускалися з гори. Із якою швидкістю туристи піднімалися вгору і з якою сп … ускалися з гори, якщо на першій ділянці вони проходили за годину на 2 км менше, ніж на другій?​ 2. Упростите выражение: X(X/3) (x+4)​ Помогите вычислить интеграл Развяжіть систему рівнянь 1/x+1/y=7/12,1/x-1/y=1/12 Предыдущий Следующий Вместе мы знаем больше Этот сайт использует cookies Политика Cookies . Вы можете указать условия хранения и доступ к cookies в своем браузере. 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Answer 1

Solving the System of Equations

To solve the system of equations {3x + y = -16, 3x + y = -21}, we can use the method of substitution or elimination. Let's proceed with the elimination method.

Adding the two equations together, we get: 6x + 2y = -37.

Now, let's solve for x and y.

Solving for y

We can solve for y by using the value of x obtained from the previous step.

Solving for x

We can solve for x by substituting the value of y into one of the original equations.

Final Solution

The solution to the system of equations is: x = 2; 8/3 y = -7/3; ±3

The detailed explanation for the solution involves the substitution of y into the equation and solving for x, followed by the calculation of the discriminant and the final values of x and y.

New Algebra Questions

1. Finding the nth term of an arithmetic progression: To find the nth term of the arithmetic progression 8.2, 7.9, 7.6, ... that equals 3.1. 2. Calculating the speed of ascent and descent: Given that tourists covered 24 km, spending 3 hours ascending and 2 hours descending, with different speeds for each segment. 3. Simplifying the expression: X(X/3) + (x + 4). 4. Integrating a function. 5. Solving a system of equations: 1/x + 1/y = 7/12, 1/x - 1/y = 1/12.

Feel free to ask about any of these questions, and I'd be happy to help!